Ingredients
The following ingredients have 4 Servings
- 1/2 cup mayonnaise
- 1 Tbsp + 1 tsp prepared horseradish (or to taste)
- 2 cloves garlic (grated or very finely minced)
- 1/4 - 1/2 tsp granulated sugar (optional)
- 1/4 tsp kosher salt
- 1/4 tsp black pepper
- 1 medium yellow onion (peeled, cut in half, then thinly sliced)
- 8 oz cremini mushrooms (sliced)
- 1/4 tsp dried thyme
- 3/4 - 1 lb boneless ribeye steak (sliced thinly against the grain, then roughly chopped)
- 4 slices provolone cheese
- 2 Tbsp unsalted butter (divided)
- 2 Tbsp vegetable oil (divided)
- 1 tsp kosher salt (divided)
- 1 tsp black pepper (divided)
- 4 hoagie rolls
