Place the ground beef into the crockpot.
Add in the diced onion, garlic, red bell pepper, fire-roasted tomatoes, tomato sauce, seasonings and broth. Stir to combine.
Cover and cook on low for 6-8 hours or on high for 3.5-4 hours.
Remove the lid. Break the lasagna noodles into bite-size pieces over the crockpot and stir them in with the other ingredients.
Divide into bowls. Top with a tablespoon of ricotta cheese, a sprinkle of mozzarella and parmesan cheese. Garnish with chopped parsley or fresh basil, if desired.