Prepare the Veggies: Heat olive oil in a large skillet over medium heat. Add onions, bell peppers, and mushrooms. Sauté for 5–6 minutes until softened. Add minced garlic and cook for another minute.
Cook the Meat: Push the vegetables to the side and add the ground beef or turkey. Cook until browned, breaking it up into small pieces. Season with Italian seasoning, salt, and pepper.
Add Sauce: Stir in the low-carb marinara sauce and let everything simmer for 3–5 minutes so the flavors combine.
Add Cheese: Sprinkle shredded mozzarella and Parmesan evenly over the top. Reduce heat to low and cover the skillet until the cheese melts, about 3–5 minutes.
Garnish & Serve: Remove from heat. Sprinkle with crushed red pepper flakes if using and garnish with fresh basil or parsley. Serve hot directly from the skillet or portion into bowls.
Serving and Storage Tips
