Step 1

Preheat oven to 350 degrees F (175 degrees C). Grease a 13x9-inch baking dish.

Step 2

Cook and stir ground beef, sausage, onion, and bell pepper together in a large skillet over medium heat until the beef and sausage are completely browned and crumbled, 7 to 10 minutes. Drain grease from skillet and return to heat.

Step 3

Stir flour, salt, oregano, and black pepper into the beef mixture. Pour spaghetti sauce over the mixture. Add mixed vegetables; bring mixture to a simmer and cook for 5 minutes. Transfer mixture to prepared baking dish.

Step 4

Roll crescent dough into a flat layer atop the beef mixture; sprinkle with Cheddar cheese.

Step 5

Bake in preheated oven until the dough is golden and the cheese is melted, about 30 minutes.