Step 1

Combine all ingredients in a mixing bowl.

Step 2

Whisk or stir together until smooth.

Step 3

Season with salt and pepper to taste. Set aside or store in the refrigerator until ready to assemble sliders.

Step 4

Preheat your oven to 400° F.

Step 5

In a mixing bowl, combine the ground beef, grated onion, parsley, garlic, salt, and pepper until all ingredients are incorporated. Don't overwork the beef mixture.

Step 6

Press the beef mixture into the bottom of a 12-inch baking sheet or a 9x12 baking dish.

Step 7

Bake for 14-15 minutes, or until the beef is fully cooked and no pink remains. Pour any excess juice or fat off the pan.

Step 8

Arrange the cheese slices over the cooked beef.

Step 9

Slice the slider buns in half horizontally with a serrated knife and place the bottom halves cut side-down over the cheese slices. Place the top halves cut side down directly on top of the bottom halves, then cover the pan with aluminum foil.

Step 10

Place the pan back into the oven for 5-7 minutes or until the cheese is melted and the buns are steamed and warm.

Step 11

Remove the top halves of the buns and set aside.

Step 12

Flip the remaining layers over so that the beef is on top. TIP: place a second sheet pan or large cutting board over the top and then flip or use two spatulas, making sure to protect your hands.

Step 13

Spread Big Mac sauce directly over the beef or on the cut side of the top buns.

Step 14

Layer the shredded lettuce and pickles on top of the beef and cover with the bun tops.

Step 15

Slice into 12 sliders and serve.