For an extra layer of flavor, consider adding a dash of hot sauce or a sprinkle of fresh herbs like chives or parsley. Feel free to experiment with different types of cheese, such as Swiss, cheddar, or provolone, to customize the flavor profile to your liking. For a vegetarian option, substitute the corned beef with sautéed mushrooms or roasted red peppers. To make ahead, assemble the sliders and wrap them individually in foil. Reheat in a preheated oven or toaster oven until warmed through.