Step 1

Place the ground beef, sausage, and onion in a large nonstick skillet over medium-high heat. Brown and crumble the meat. Drain off grease.

Step 2

Add garlic and cook for 1 minute.

Step 3

Add tomato paste, diced tomatoes, pasta sauce, Italian seasoning, red pepper flakes, salt, and pepper. Simmer for a minute or two.

Step 4

Transfer half the sauce to a lightly greased 6-quart slow cooker.

Step 5

Add the broken spaghetti. Top with remaining sauce.

Step 6

Sprinkle on the cheese. Cover and cook on LOW for 4 hours.

Step 7

Stir well and serve.