Combine first 5 ingredients. Place 1/3 c mixture just below center of each tortilla. Fold opposite sides of tortilla over filling, forming rectangles; secure with wooden picks. Pour oil into a large skillet and heat to 325. Fry chimichangas in batches, 4 to 5 minutes on each side until lightly browned. Drain on paper towels. Remove picks. Serve with toppings. Heat corn and serve hot.