I made these on Father's Day & they were very tasty. We threw them on the grill with the steaks. They were ready in no time (and it sure beat turning on the oven or stove in this hot weather).
6-8 medium Potatoes, cubed (not too small or they will overcook)
1/4 c. - 1/2 c. butter
Place cubed potatoes in a large Ziploc bag. Drizzle with olive oil. Add salt, pepper & garlic salt. Seal bag & shake until potatoes are well coated with olive oil & seasonings. Take aluminum foil & make several layers going vertical & horizontal. Pour potatoes from Ziploc bag onto the center of your aluminum foil. Add slices of butter all over. Take the foil & fold all the edges to the top. It is very important to seal the foil really good. You can place the "pocket" directly on the grill. Be sure to turn & move the "pocket" around. When your meat is ready, your potatoes should also be done. To serve: flip the pocket over so that the smooth side of the foil is facing up. Take a knife & cute a large "X" on that side. Carefully peel back the foil edges & serve just like that! We also do the same process to make peppers & onions for grilled Italian sausages.