Easy Cheesy Potato Packets

4 (18 x 12-inch) sheets heavy duty aluminum foil
1 1/3 pounds (4 medium) potatoes, cut in 1/4-inch slices
12 ounces ham, cut in 1/2-inch cubes
1 (10 ounce) package frozen green peas
1/2 teaspoon pepper
1 (16 ounce) jar pasteurized process cheese sauce

Preheat oven to 450 degrees F or set grill to medium-high. Spray foil with nonstick cooking spray. Center one-fourth of potato slices on each sheet of heavy duty aluminum foil. Top with ham and peas; sprinkle with pepper. Spoon cheese sauce over ingredients. Bring up foil sides. Double fold top and ends to seal packet, leaving room for heat circulation inside. Repeat to make four packets. Bake 30 to 35 minutes on a cookie sheet in oven or grill for 8 to 12 minutes in covered grill.