Bacon, Onion, Raclette Potato Gratin

Name: Bacon, Onion, Raclette Potato Gratin
Prep time: 10 min
Cook time: 30 min
Total time: 40 min
Cuisine: French
Ingredients: 3 potatoes (3 medium size potatoes, peeled and sliced into ½" rounds); 1 yellow onion (1 yellow onion, peeled and finely chopped); 2 tablespoons butter (2 tablespoons unsalted butter + extra for the gratin dish); 1 tablespoon olive oil (1 tablespoon olive oil); 6 slices bacon (6 slices of thick bacon, sliced into small bite-size pieces); 8 ounces raclette cheese (8 ounces raclette cheese); 2 tablespoons heavy cream (2 tablespoons heavy cream); salt and pepper (salt and pepper)