Soften and season the onions

• Slice the onion and cook it in a pan until soft and mellow.
• Season lightly with adobo seasoning and a little sugar.

Make the burger sauce

• In a bowl, combine the mayonnaise, mustard, ketchup, relish and some of the cooked onions.
• Season with complete seasoning, taste and adjust as needed.

Form and season the patties

• Shape the ground beef into small patties.
• Season both sides with salt, garlic powder and black pepper.

Smash and cook the patties

• Smash the patties flat in a hot pan and cook until browned.
• Flip, add a cheese slice and let it melt.

Assemble the burgers

• Spread burger sauce on the split mini croissants.
• Add the patties, cheese and a spoonful of onions, then close the croissants.