1Heat oil in large skillet on medium heat. Add onions; cook 4 min. or until crisp-tender, stirring occasionally. Stir in chili's
Hollow out inside of of bread halve, leaving 1/2-inch-thick shells. Discard removed bread or reserve for other use.
Place franks in bottom half of bread. Top 2 cheese slices,red peppers and onion mixture;cover with remaining cheese slices and top of bread. Wrap in foil.
Bake 20 minutes or until sandwich is heated through and cheese melted.