Crustless Spinach, Onion and Feta Quiche
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I still remember the first time I skipped the crust and went straight for the custard — the result was surprisingly light, savory, and so much easier to make. This crustless spinach, onion and feta quiche is a weeknight lifesaver and a brunch favorite: simple eggs and milk set around tender sautéed onions, wilted spinach, and tangy crumbled feta. It’s quick to assemble, forgiving in texture, and excellent hot or room temperature. If you want a printable version or another take on this exact recipe, check the full recipe page for more details: the full recipe page.
Why you’ll love this dish
This quiche delivers big flavor with minimal effort. Without a crust it’s lower in carbs and calories, but still satisfying thanks to the rich egg custard and salty feta. It’s versatile — serve it for breakfast, pack it for lunch, or slice it for a light dinner with salad. Because there’s no pastry to worry about, prep time is shorter and cleanup is easier.
“We served it at a casual brunch and everyone asked for seconds — the feta gives it a bright tang and the onions caramelized perfectly.” — a quick kitchen test
Other reasons to try it:
- Fridge-friendly: makes great leftovers and slices well.
- Budget-wise: uses pantry staples and a small block of cheese.
- Kid-friendly: mild flavors, and you can sneak in extra spinach.
The cooking process explained
Before you start, here’s what happens in a few quick steps so you know what to expect: sauté the onion until soft and sweet, wilt the fresh spinach briefly, whisk eggs with milk and seasonings, fold in the cooled vegetables and feta, pour into a prepared baking dish, then bake until the center is set but still slightly jiggly. Rest, slice, and serve.
Gather these items
What you’ll need for one 9-inch quiche (or similar baking dish):
- 1 cup fresh spinach, chopped — use fresh for best texture; press out excess moisture after wilting.
- 1 small onion, chopped — sautéeing softens and sweetens the flavor.
- 1 cup feta cheese, crumbled — swap goat cheese or sharp cheddar if you prefer.
- 4 large eggs — room temperature eggs mix more evenly.
- 1 cup milk — whole milk gives richer custard; use low‑fat for a lighter version.
- 1/2 teaspoon salt
- 1/4 teaspoon black pepper
- 1/4 teaspoon nutmeg — optional but classic with egg custards.
- 1 tablespoon olive oil — for sautéeing the onion.
If you like measurements or alternate ingredient suggestions, you can see other versions and substitution notes here: alternate measurements and swaps.
How this recipe comes together
Follow these clear steps for a reliable result. Prep and timings are short, and the technique is forgiving.
- Preheat and prep: Preheat your oven to 350°F (175°C). Lightly grease a 9-inch pie dish or similar baking pan.
- Sauté the onion: Heat 1 tbsp olive oil in a skillet over medium heat. Add the chopped onion and cook until soft and translucent, about 6–8 minutes. Let cool slightly.
- Wilt the spinach: Add the chopped spinach to the skillet for 1–2 minutes until just wilted. Remove and squeeze out excess moisture with a clean towel or spoon.
- Whisk custard: In a bowl, whisk 4 eggs with 1 cup milk, 1/2 tsp salt, 1/4 tsp black pepper, and 1/4 tsp nutmeg until combined.
- Combine: Stir the cooked onion and spinach into the egg mixture, then fold in the crumbled feta.
- Bake: Pour the mixture into the prepared dish and bake for 30–40 minutes, or until the edges are set and the center registers 160–165°F (71–74°C) or is just slightly jiggly.
- Rest: Let the quiche rest 10–15 minutes before slicing so it finishes setting.
Directions
- Preheat oven to 350°F (175°C). Grease a 9-inch pie pan or ovenproof dish.
- Heat olive oil over medium. Add chopped onion and sauté until soft and golden, 6–8 minutes.
- Add chopped spinach to the pan and cook until just wilted, about 1–2 minutes. Drain any excess liquid.
- In a mixing bowl, whisk eggs with milk, salt, pepper, and nutmeg until smooth.
- Stir the cooled onion and spinach into the egg mixture. Fold in crumbled feta.
- Pour the mixture into the prepared dish and smooth the top.
- Bake 30–40 minutes. Check at 30 minutes; the center should be set but slightly springy.
- Allow to rest 10–15 minutes; slice and serve.
Preparation tip: Let hot vegetables cool a little before adding to the eggs to avoid cooking the eggs prematurely.
Best ways to enjoy it
Serve slices warm or at room temperature. Some pairing ideas:
- Fresh green salad with lemon vinaigrette for a light meal.
- Roasted cherry tomatoes or a simple tomato salad for acidity.
- Crusty bread or a grain-side (quinoa, farro) if you want something heartier.
- For brunch, add smoked salmon or thinly sliced ham on the side.
If you want inspiration for side dishes and presentation, see these serving ideas and pairings: serving suggestions and pairings.
Storage and reheating tips
- Refrigerator: Cool to room temperature, cover tightly, and refrigerate within 2 hours. Keeps 3–4 days.
- Freezing: Cut into portions, wrap tightly in plastic and foil, and freeze up to 2 months. Thaw in the fridge overnight before reheating.
- Reheating: Warm slices in a 350°F oven for 10–15 minutes or microwave individual pieces for 45–60 seconds (time varies by microwave). If frozen, reheat from thawed state for best texture.
- Food safety: Reheat to at least 165°F (74°C) before serving.
Pro chef tips
- Drain spinach well: Excess moisture makes the quiche watery. Press with a towel or squeeze in a sieve.
- Room-temp eggs: Let eggs sit out 10–15 minutes to mix evenly for a smoother custard.
- Feta texture: Use a firmer crumbled feta; very wet feta can add unwanted moisture.
- Nutmeg: Just a pinch adds warmth to egg-based dishes without overpowering.
- Nonstick trick: Line the dish with parchment for easy removal and cleaner slices.
Recipe variations
- Mediterranean: Add sun-dried tomatoes, kalamata olives, and oregano.
- Mushroom boost: Sauté mushrooms with the onion for an earthy flavor.
- Dairy-free: Replace milk with unsweetened almond milk and use a dairy-free cheese.
- Herbs: Fold in chopped dill, parsley, or chives for freshness.
- Protein add-ins: Stir in cooked bacon, pancetta, or shredded rotisserie chicken.
Common questions
Q: How long does it take to make from start to finish?
A: Active prep is about 15 minutes (sautéing and whisking); baking and resting add another 40–55 minutes total.
Q: Can I use frozen spinach?
A: Yes — thaw and squeeze out all moisture, then proceed. Reduce wilting time and ensure spinach is well-drained.
Q: My quiche is still jiggly after baking — is it done?
A: A slight jiggle in the center is okay; it will finish setting as it rests. If very liquid, return to the oven in 5–10 minute increments.
Q: Can I double the recipe?
A: Yes. Use two 9-inch pans or a larger baking dish. Adjust baking time if using a deeper dish — check doneness with a thermometer.
Q: Is this suitable for meal prep?
A: Absolutely — it stores well and reheats cleanly. Slice into portions for grab-and-go breakfasts.
Conclusion
If you enjoy comparing approaches, the original version on Baking Bites is a great reference for technique and inspiration: Crustless Spinach, Onion and Feta Quiche – Baking Bites. For another home cook’s take with slightly different ratios and tips, Served From Scratch offers helpful variations: Crustless Spinach and Feta Quiche – Served From Scratch. And if you’re curious about a mushroom-forward crustless quiche for budget-friendly dinners, Budget Bytes has a reliable recipe to compare: Spinach and Mushroom Crustless Quiche – Budget Bytes.
Crustless Spinach, Onion and Feta Quiche
Ingredients
Method
- Preheat your oven to 350°F (175°C) and lightly grease a 9-inch pie dish or similar baking pan.
- In a skillet, heat 1 tablespoon of olive oil over medium heat, add the chopped onion, and cook until soft and translucent, about 6–8 minutes. Let cool slightly.
- Add the chopped spinach to the skillet for 1–2 minutes until just wilted. Remove from heat and squeeze out excess moisture with a clean towel or spoon.
- In a bowl, whisk together the eggs, milk, salt, black pepper, and nutmeg until well combined.
- Stir the sautéed onion and spinach into the egg mixture and fold in the crumbled feta cheese.
- Pour the mixture into the prepared dish and smooth the top.
- Bake for 30–40 minutes, checking at 30 minutes; the center should be set but slightly springy.
- Allow the quiche to rest for 10–15 minutes before slicing and serving.
