Preheat the oven to 350°F. Grease a 9 x 13-inch pan with cooking spray and line it with parchment paper. Without separating them, slice the slab of rolls horizontally into two halves.
Heat oil in a heavy-bottomed pan over high heat. Add the ground beef, brown it, and then crumble it. As it cooks, season the beef with salt, pepper, garlic powder, and onion powder. Drain off any excess grease and let the beef cool slightly.
In a bowl, whisk together all the sauce ingredients until smooth. Set aside 1/4 cup of the sauce and mix it into the slightly cooled beef. Spread 3 tablespoons of sauce on the bottom half of the rolls and another 3 tablespoons on the top half. Store any leftover sauce in the fridge, covered.
Place the bottom half of the rolls in the prepared pan. Layer half of the cheese over the rolls. Evenly distribute the beef over the cheese. Top with the remaining cheese. Bake this arrangement without the top half of the rolls for 10 minutes.
Remove from oven and add the top slab of rolls. Use a pastry brush to spread the melted butter over the top and sides of the rolls. Sprinkle sesame seeds on top. Cover pan with foil and bake for 20 minutes. Remove foil and bake for another 5–10 minutes, or until the top is golden brown and the cheese is melted. Serve hot, cutting into individual sliders. Enjoy with any leftover sauce for dipping!
Notes
Note 1: Keep the rolls intact and slice in half horizontally. Note 2: Choose either an 8-ounce block of Cheddar to shred yourself, or an 8-ounce package of pre-sliced cheese, ideally with 12 slices. Sharp Cheddar has more flavor!Note 3: For butter, I like Kerrygold® garlic butter. Or mix 3-1/2 tablespoons of butter with 1/2 teaspoon garlic powder and 1 teaspoon Italian seasoning for a homemade version.Storage: For leftovers, cool and store in an airtight bag in the fridge for 3–5 days. Reheat in the oven or air fryer until heated through; avoid the microwave.