Step 1

Preheat oven to 350 degrees F.

Step 2

Heat a large skillet over medium heat. Add ground beef, onions & Montreal seasoning. Cook until meat is cooked through, breaking up meat while cooking (use a meat chopper). Drain the grease.

Step 3

While the meat is cooking, cut the slider buns in half horizontally. Set the bun tops aside. Line a 9x13 casserole dish with parchment paper and spritz with non-stick spray. Place bottom buns in the casserole dish, cut side up.

Step 4

Place 6 slices of cheese over the bottom buns. Layer with the ground beef mixture and top with remaining 6 slices of cheese.

Step 5

Spread mayonnaise over the cut side of the top buns and place on top of sliders.

Step 6

Brush melted butter over buns and sprinkle with sesame seeds.

Step 7

Cover with aluminum foil. Bake for 15-20 minutes, until cheese is melted. Let rest for 5 minutes before serving.