Vegetarian Mexican Taco Dinner Meatless Tacos Vegetarian Fair. Ingredients 1/2 cup water 1/4 cup lentils, rinsed and drained 1/4 cup chopped onion 8 taco shells 1 8-ounce can tomato sauce 1/2 of a 1-1/8- or 1-1/4-ounce envelope (5...