Warm tortillas according to package directions. Spoon 1 cup bean mixture down the center of each tortilla. Top each with 1 tablespoon cheese and shredded lettuce; roll up. Cut each burrito in half diagonally; place 2 burrito halves on a plate; serve with 1 tablespoon sour cream and 2 tablespoons salsa.
Note:You can substitute two (15-ounce) cans black beans, drained, for 1 cup dried beans and omit step 1, if desired.