Preparation Time: 1:50 Preheat the oven to 350 degrees. Cook the lentils, onion, carrot, and green pepper in the water for 30 minutes. Add the tomato sauce and seasonings to the pot and cook for 30 minutes longer. Stir in the elbow macaroni and torn-up tortillas. Spoon into a casserole dish and bake for 30 minutes.