Prepare the Beef Mixture
Preheat oven to 350°F (175°C).
In a skillet, cook ground beef with minced onion until fully browned. Drain excess grease.
Season with salt, garlic powder, black pepper, and minced onion to taste. Let cool slightly.
Prepare the Rolls
Slice the dinner rolls horizontally, keeping the top and bottom halves intact. Place the bottom halves in a greased 9x13 baking dish.
Layer the Sliders
Spread cooked ground beef evenly over the bottom halves of the rolls.
Top with slices of American cheese.
Place the top halves of the rolls back on.
Brush and Bake
Brush the tops with melted butter and sprinkle with sesame seeds.
Cover with foil and bake for 15 minutes, then uncover and bake for 5 more minutes until the tops are golden brown.
Add Classic Big Mac Toppings
Remove from oven and carefully lift the top half of the rolls.
Spread Thousand Island dressing evenly, then add shredded lettuce and pickle slices.
Replace the top rolls and press gently.
Serve and Enjoy
Cut into individual sliders and serve warm.