In 15x10-inch pan or on large cookie sheet, prepare fish fillets as directed on package, except during last 15 minutes of baking, reduce oven temperature to 375°F.
Remove fish from oven. Move fish to one side of pan. Separate dough into 5 biscuits; place 1 inch apart in same pan.
Return pan to oven; bake at 375°F. for 11 to 15 minutes or until biscuits are golden brown and fish is thoroughly heated.
Split warm biscuits; spread each biscuit half with sandwich spread. Top bottom halves of biscuits with lettuce, Canadian bacon, fish fillet, cheese and tomato. Cover with top halves of biscuits.