Preheat oven to 500°.
Combine zucchini and next 3 ingredients in a large zip-top plastic bag. Add oil and next 5 ingredients; shake well to coat.
Spoon vegetable mixture onto a 15 x 10-inch jelly roll pan coated with cooking spray.
Bake at 500° for 30 minutes or until browned, stirring occasionally. Let stand 5 minutes. Sprinkle with cilantro and lime juice.
Combine refried beans, salsa, chipotle chile, and cumin in a medium bowl. Spoon 1/4 cup bean mixture down center of each tortilla. Top each tortilla with 1/2 cup roasted vegetable mixture, and roll up; wrap in foil.
Reduce oven temperature to 350° and bake for 15 minutes or until thoroughly heated. Top each burrito evenly with sour cream.