Midwestern Casserole | Easier Eats

Ingredients

• 1 (12-ounce) carton mushrooms, sliced
• 1 tablespoon olive oil or neutral-flavored cooking oil
• 1 large onion, chopped
• 5 cloves garlic, minced
• 1 bell pepper, color of your choice, finely chopped
• salt, to taste
• 1 1/2 pounds lean ground beef
• 1 (28-ounce) can whole plum tomatoes
• 3 tablespoons tomato paste
• 3/4 teaspoon dried oregano
• 1/4 teaspoon crushed red pepper flakes
• freshly ground black pepper, to taste
• 12 ounces elbow macaroni
• 1 (8-ounce) block cheddar cheese, grated, divided
• 4 ounces parmesan cheese, grated, divided