Preheat the oven to 350°F. Butter the bottom of a rimmed baking sheet with a tablespoon of butter to give the sliders a crispy, buttery bottom.

Add extra virgin olive oil to a skillet over medium-high heat. Add diced onion and cook for 1 minute. Add the ground beef and break up with a spatula.

Season with salt, pepper, and garlic powder. Continue to break up the beef until fully cooked, about 7 to 8 minutes. Drain excess grease.

Stir in mayonnaise, ranch dressing, relish, ketchup, and mustard.

Slice the dinner rolls in half horizontally, keep them together as one unit.

Place the bottom half of the dinner rolls on the buttered baking sheet.

Add cheddar cheese slices on the bottom half of the dinner rolls.

Spread the ground beef mixture evenly over the sliced cheese layer. Use a spatula to smooth the edges.

Add shredded cheddar cheese on top of the ground beef.

Place the top of the dinner rolls over the grated cheese. Brush the tops with a tablespoon of melted butter and sprinkle sesame seeds on top.

Place a loose aluminum foil tent over the slider and bake for 10 minutes. Remove the foil and bake an additional 3 to 5 minutes or until cheese is melted and tops are golden brown.

Remove from oven and cut along dinner roll lines. Serve warm.