Mix tomatoes, salsa, thyme, oregano, celery seed, and 1/4 cup green onions.
Fry tortillas in oiled skillet until softened, turning once. Spoon 1/4 cup cheese onto center of each tortilla. Top with two tablespoons tomato mixture and 2 rounded tablespoons corn. Roll tortillas around filling and place in a large, shallow baking pan.
Mix sour cream and remaining green onion. Spoon over tortillas Top with remaining tomato mixture. Sprinkle with remaining cheese.
Bake at 350 degrees for 20 minutes or until heated through.