Preheat the oven to 350°F (175°C). Lightly grease a loaf pan or line a baking sheet with parchment for free-form loaves.

Heat 1 tsp olive oil in a skillet over medium heat. Add the finely chopped onion and bell pepper. Sauté for 4–5 minutes until softened.

Add the minced garlic to the pan and cook for 30 seconds until fragrant. Remove from heat and let cool slightly.

In a large bowl, combine ground beef, ground mild Italian sausage, the sautéed vegetables, Worcestershire sauce, and dried oregano. Gently mix with your hands or a fork until combined—avoid overmixing to keep the loaf tender.

Shape the mixture into a loaf and place it in the prepared pan (or shape directly on the baking sheet).

Bake for 50–65 minutes, or until an instant-read thermometer inserted into the center reads 160°F (71°C). If you like a glazed top, brush with a light tomato-based glaze in the last 10–15 minutes.

Remove from oven and let rest for 10 minutes before slicing. Resting locks in juices and makes slicing easier.