Easy Roast Beef Sliders (Print Version)

# Ingredients:

→ For the Sliders

01 - 1 pack of King's Hawaiian savory butter rolls (look for the yellow banner)
02 - 1/4 cup good quality mayo
03 - 1 tablespoon prepared horseradish sauce
04 - 8 ounces thinly sliced provolone or Swiss cheese
05 - 8 ounces thinly sliced deli roast beef
06 - 1/2 cup sweet caramelized onions
07 - 4 tablespoons butter, melted
08 - 1 teaspoon Worcestershire sauce
09 - 1/2 teaspoon onion powder
10 - 1/4 teaspoon garlic powder
11 - 1/2 tablespoon fresh parsley, finely chopped, plus extra for topping

→ For the Dipping Sauce

12 - 2 cups rich beef broth or stock
13 - 2 tablespoons unsalted butter
14 - 1 large garlic clove, finely minced
15 - 1-1/2 tablespoons all-purpose flour (optional for thickness)
16 - 1 tablespoon Worcestershire sauce
17 - 1-2 teaspoons beef bouillon paste, if needed for extra flavor
18 - 1 teaspoon fresh thyme leaves or 1/4 teaspoon dried
19 - Kosher salt and fresh black pepper to taste

# Instructions:

01 - Grab a sharp serrated knife and carefully slice through the entire pack of rolls horizontally, creating two large slabs—tops and bottoms. Lay both halves cut-side up on a baking sheet. Crank your broiler to high and position the rack about 6 inches from the heat source. Pop the rolls under the broiler and watch them like a hawk—they'll turn golden and toasty in just 1 to 2 minutes. Don't wander off or they'll burn!
02 - Switch your oven to 350°F and move the rack to the center position. Give a rectangular glass or ceramic baking dish (at least 10.5 by 7.5 inches) a light spritz of cooking spray. Nestle the bottom roll slab into the dish with the toasted side facing up.
03 - In a small mixing bowl, blend together the mayo and horseradish sauce until smooth. Spread half of this tangy mixture evenly across the bottom rolls in your baking dish.
04 - Start building your sliders by laying half the cheese slices over the horseradish mayo. Next, pile on all the roast beef in an even layer, followed by those sweet caramelized onions. Top everything with the remaining cheese. Flip over the top roll slab and spread the rest of your horseradish mayo on its toasted side, then gently place it mayo-side down over the cheese.
05 - Mix the melted butter with Worcestershire, garlic powder, onion powder, and chopped parsley in a small bowl. Generously brush this savory butter mixture all over the tops and down the sides of the assembled rolls, letting it drip into the dish. Sprinkle the parsley evenly on top—don't worry if it seems like a lot of butter, the rolls will soak it right up!
06 - Cover your baking dish tightly with aluminum foil and slide it into the oven for 20 minutes until everything's heated through and the cheese gets nice and melty. Pull off the foil and bake for another 5 to 8 minutes until the tops turn golden brown and slightly crispy.
07 - Let the sliders rest for a couple minutes after removing from the oven. Use your serrated knife to cut them into individual portions. Add a sprinkle of fresh parsley if you like, and serve immediately with warm dipping sauce on the side.
08 - While your sliders bake, make the dipping sauce. Melt butter in a medium saucepan over medium heat. Toss in the minced garlic and sauté for 1 to 2 minutes until it smells amazing. Sprinkle in the flour and keep stirring for another minute or two.
09 - Slowly pour in the beef broth while whisking constantly to avoid lumps. Add the Worcestershire, fresh thyme, and about 1/4 teaspoon of black pepper. Bring everything to a gentle boil, then reduce the heat and let it simmer for 10 minutes, stirring now and then. Give it a taste—if it needs more depth, whisk in some beef bouillon paste until it's just right. Season with additional salt and pepper as needed. Pour the sauce through a fine-mesh strainer to remove the solids, and keep it warm until serving time. Pour into small individual bowls for easy dipping.

# Notes:

01 - Make your caramelized onions ahead of time to save yourself some stress on game day—they take a while to cook properly but can be refrigerated for several days.
02 - Horseradish strength varies wildly between brands, so start with the amount listed and adjust up or down based on your preference and how spicy your particular jar is.
03 - The flour in the dipping sauce gives it a slightly thicker consistency that helps prevent the soft rolls from getting soggy too quickly. Feel free to skip it if you prefer a thinner, brothier sauce.
04 - If using a dark-colored baking pan instead of a light one, drop your oven temperature to 325°F and keep an eye on the bottoms so they don't burn.
05 - These sliders are perfect for parties, tailgating, or casual weekend dinners. The total time doesn't include making the caramelized onions from scratch.

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