FOR each serving: Spread each of 3 toast slices with 1 tsp. of the mayo. Cover 1 toast slice with 1-1/2 oz. turkey, 2 tomato slices, 1 lettuce leaf and 1 slice each process cheese and bacon; top with second toast slice. Repeat layers of turkey, tomato, lettuce, process cheese and bacon; cover with remaining toast slice.
CUT sandwich into 4 triangles. Secure each piece with a frilled 4-inch toothpick.