Lentil shepherd's pie is a vegetarian version of the classic dish. It's made with cooked lentils, vegetables, and mashed potatoes, and can be customized to your liking. Lentil shepherd's pie is a great way to add more plant-based protein to your diet, and it's also vegan and gluten-free. You can add cheese or breadcrumbs to the mashed potatoes for extra flavor and texture.