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 while still together. Keep them intact as one unit.

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

Add the 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 square off the edges.

Add the shredded cheddar cheese on top of the ground beef.

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

Loosely tent aluminum foil over the sliders and bake for 10 minutes. Remove foil and bake for an additional 3 to 5 minutes until cheese melts and tops are golden.

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