Three Cheese Grilled Potatoes

I saw this recipe on Pinterest and adapted it a bit (it's originally from Taste of Home). I grilled it ahead of some steaks and it was delicious! My husband raved about them. :)

4 russet potatoes, peeled and cubed
1 medium onion, chopped
3 tbsp grated parmesan cheese
1 tbsp minced chives (I used dry, since that's what was on hand)
1/2 tsp seasoned salt
1/4 tsp pepper
sprinkling of kosher salt
2 tsp olive oil
2 tbsp butter, diced
1/2 cup shredded mozzarella cheese
1/2 cup shredded cheddar cheese

In a large bowl, combine the potatoes, onion, parmesan, chives, 2 salts, pepper, and olive oil. Transfer to a criss-cross of aluminum foil, sprayed with non-stick spray. Dot the potatoes with the butter. Fold the foil around the potatoes and seal tightly.

Grill over med-low heat  for about 20 minutes. Open foil to stir potatoes. Top with both shredded cheeses, reseal foil, and grill for about 10 more minutes. (You can also add some cooked, chopped bacon with the cheese!)