Editor's note: The recipe and introductory text below are from Mark Bittman's book How to Cook Everything Vegetarian.
Pita makes a wonderful crust for this stuck-pot recipe, but you can use tortillas or lavash instead (see the Stuck-Pot Rice and Beans with Tortilla Crust variation). This dish is quite complex in both flavor and texture, and the earthy lentils with lightly caramelized onions and sweet bits of dates or raisins are delicious. Use oil, and this becomes vegan.