1Heat oil in a skillet over medium heat; cook and stir onion until tender and lightly browned, 10 to 15 minutes.
2Preheat oven to 400 degrees F (200 degrees C). Place pizza crust on a baking sheet or pizza stone.
3Mix sour cream and horseradish together in a bowl; spread onto pizza crust. Layer potato slices over sour cream; top with 1 cup Swiss cheese. Layer onion, prime rib, mushrooms, and green bell pepper on top; cover with remaining 1 cup Swiss cheese.
4Bake in the preheated oven until cheese is melted and crust is lightly browned, about 20 minutes.
Footnotes
Cook's Note:
Use any variety of cheese (such as mozzarella or provolone) in place of the Swiss, if desired.
Ingredients
8 servings
505 cals
1 tablespoon olive oil
1 onion, sliced
1 prepared pizza crust
1 cup sour cream
1 tablespoon prepared horseradish
2 baked potatoes, sliced
2 cups shredded Swiss cheese, divided
1 (3 ounce) fillet cooked prime rib, cut into bite-size pieces, or to taste