Make the burger sauce

• Combine the mayonnaise, ketchup, mustard, relish and a little sugar in a bowl.
• Stir everything together until smooth.
• Let the sauce chill while you prepare the beef.

Cook the seasoned beef

• Brown the ground beef in a pan, breaking it up as it cooks.
• Season with onion powder, garlic powder, black pepper, Cajun seasoning and a little liquid smoke.
• Stir the seasonings through and cook until the beef is fully done.

Slice the rolls

• Cut the Hawaiian rolls in half horizontally, keeping the bottoms and tops in one piece.

Assemble the sliders

• Place the bottom half of the rolls in a baking dish.
• Drizzle the burger sauce all over the bottoms.
• Add the Colby Jack cheese, then spread the cooked beef on top and cover with the roll tops.

Brush with butter and parsley

• Melt the butter with the chopped parsley.
• Brush the mixture over the tops of the rolls.

Bake the sliders

• Bake at 175 °C until the cheese is melted and the rolls are golden.
• Brush the remaining parsley butter over the hot sliders before serving.