Tear off 4 large square sheets of aluminum foil. Drizzle all 4 foil aluminum square pieces with olive oil.
Put 1 Tablespoon of butter on each foil sheet.
Dice potatoes into cubes (about 1-inch). Leaving the skin on. Divide up the cubed potatoes and place on top of the butter on each aluminum foil square.
Evenly sprinkle minced garlic and diced onion over each of the four servings. Then sprinkle with kosher salt and pepper.
Drizzle with a little bit more olive oil.
Put steak pieces on top of potatoes. Season with a bit more salt, pepper and your favorite steak seasoning (use as little or as much as you like).
Drizzle with a tiny bit more olive oil and put another pat of butter on top. Also, another good tip to keep your meat from getting dried out while cooking is to add a large ice cube on top of the meat.
Fold up each of the sides to make a nice little bed for the potatoes, making a square so none of the butter and oil can escape while cooking.
Preheat grill to medium-high heat. Grill packets for about 35-45 minutes (this will cook the steak to about medium well). Check periodically for your preferred level of doneness for the steak (just make sure the potatoes are tender).
Video
Notes
Please refer to my FAQ’s and ingredient list above for other substitutions or for the answers to the most common questions.
Be careful when opening the packets because the steam is going to come out of there fast and furious.