In a medium pan over medium-high heat, brown the ground beef for about 5 minutes. Drain the excess fat. Add half of the diced onions and sauté for 2-3 minutes or until they soften. Add the minced garlic, and cook for an additional 20 seconds. Turn off the heat, and transfer the beef mixture to the slow cooker.
1 pound ground beef
Cook the pasta to al dente according to the package instructions. Set aside.
2 cups uncooked pasta
Add the jar of marinara sauce, diced tomatoes, bell pepper, remaining onion, paprika, oregano, Italian seasoning, water, and salt to the slow cooker. Stir to combine the ingredients.
1 (16-ounce) jar marinara sauce, 28 ounces diced tomatoes, 1 teaspoon paprika, 1 Tablespoon dried oregano, 2 teaspoons Italian seasoning, 3 cups water, 1 teaspoon salt
Cook the mixture on medium heat in the slow cooker for 4 hours.
After 4 hours, add the cooked pasta, and the shredded Mozzarella cheese. Stir well to combine all the ingredients.
1 cup shredded Mozzarella cheese
Continue to cook for 30 minutes or until the pasta is well combined and the cheese is melted.
Sprinkle the shredded Parmesan cheese on top, and serve warm.
1/4 cup shredded Parmesan cheese for garnish
Store in an airtight container in the fridge for 2-3 days or in the freezer for 3-4 months.