Recipe from Eating Well. Shredded leftover turkey tops homemade tostadas in this Tex-Mex favorite. Making your own tostada shells from fresh corn tortillas is easier than you might think—crisp them up in the oven while you prepare the toppings. Choose either regular petite diced tomatoes or those with added jalapeños, depending on your inclination for spicy food. Serve with black beans, rice and extra salsa or hot sauce on the side.