Preheat the oven to 425 degrees.
In a large bowl, add steak, potatoes, corn, onions, garlic, and oil. Toss to mix.
Add seasonings, stir to coat.
Place foil on a flat surface and spoon ⅕th of the mixture onto the foil, adding 3 pieces of corn on the cobs in each packet.
Place a tablespoon of butter into each packet.
Fold to seal and place on a baking sheet.
Bake for 20-25 minutes or until potatoes are tender.
