Preheat oven to 475°.
. Combine first 8 ingredients in a large bowl, tossing gently to coat vegetables. Spread vegetable mixture in a 15 x 10-inch jelly-roll pan coated with cooking spray. Bake at 475° for 30 minutes or until browned, stirring occasionally.
. While vegetables roast, combine tomato, cilantro, lime juice, and salt in a small bowl; toss well, and set salsa aside.
. Remove roasted vegetables from oven; stir in corn.
. Heat tortillas according to package directions. Sprinkle 1/4 cup cheese down the center of each tortilla; top each with 1/2 cup vegetable mixture, and roll up. Serve with salsa and sour cream.
Note: You may substitute frozen corn for fresh, if desired. Thaw and drain the corn before stirring it into the roasted vegetables. It is not necessary to cook the corn.