"This 5-Ingredient Amish Baked Spaghetti is an easy dinner recipe that your entire family will love!..."
1 small onion
1 lb. lean ground beef
Salt and pepper, to taste (I used about 1/2 teaspoon salt and 1/4 teaspoon pepper)
3 cups homemade or store-bought marinara sauce
8 ounces uncooked spaghetti
1/2 cup grated cheese (I used a blend of Italian cheeses, but just mozzarella cheese or just cheddar cheese would work too)