Lentil and sausage casserole is a hearty and flavorful dish that is perfect for a family dinner. Start by sautéing onions, garlic, and sausage in a pot until they are browned. Add in lentils, diced tomatoes, and your favorite seasonings. Let the casserole bake in the oven for about 30 minutes until it is hot and bubbly. Serve with crusty bread for a filling and satisfying meal.