Ingredients
Equipment
Method
- Preheat oven to 375°F. Move rack to top third of oven.
- Cook spaghetti in salted boiling water 2 minutes less than package directions. Drain and add to 9×13 baking dish.
- In a skillet, cook beef, onion, oregano, and red pepper flakes until beef is browned (10 minutes). Drain excess fat if needed.
- Add garlic and cook 1 minute. Stir in marinara sauce, season with salt & pepper, and simmer briefly.
- Pour sauce mixture over pasta. Toss until coated, then smooth into even layer.
- Top with mozzarella, cheddar, and parmesan. Bake uncovered 20 minutes. Broil 2 minutes if desired for golden top.
- Let rest 5–10 minutes. Slice into squares and serve. Garnish with parsley if desired.
Notes
For best results, undercook the pasta slightly so it absorbs the sauce while baking. Always let it rest 5–10 minutes before serving for clean slices.