4Russet potatoesvery thinly sliced (I carefully used a mandolin to get 1/8 inch slices)
1poundsliced gruyere cheese
1 to 1 1/2cupsheavy cream
1cupshredded cheddar cheese
Instructions
Set a large cast iron skillet over medium heat (I used a 12 inch skillet). Add a tablespoon of the olive oil and the diced onion. Cook 3 to 4 minutes, stirring a few times.
Add the garlic, ham, kosher salt, and pepper and cook 2 to 3 more minutes. Remove from the skillet and set aside.
Add the remaining tablespoon of olive oil to the skillet and brush evenly over the skillet (or a casserole dish) and up the sides. Place a layer of the thinly sliced potatoes in the skillet, kosher salt and pepper, a layer of cheese slices, and the onions and ham. Repeat the layers a few times.
Pour the heavy cream over the potatoes, use just enough to barely cover the potatoes. Add the shredded cheese over top.
Set the Traeger to 350 degrees. Place the skillet or casserole dish on the grill grate for about 1 1/2 hours.