Cook the beef and onion

• Dice the onion and add it to a pan with the ground beef.
• Cook until the meat is fully browned.

Season the meat

• Drain the grease from the pan.
• Stir in the seasonings.

Assemble the sliders

• Cut the Hawaiian rolls in half and place the bottom half in a baking dish.
• Layer cheese, the seasoned meat, then more cheese.
• Top with the upper half of the rolls.

Brush with oregano butter

• Melt the butter and stir in the oregano.
• Brush the mixture over the tops of the rolls.

Bake

• Cover the dish with aluminum foil to keep the rolls soft.
• Bake at 180 °C until the cheese is melted.