Mini hamburgers with pickles

Ingredients:

• 1 kg lean ground beef
• 36 small hamburger buns, cut into 2 pieces
• 1 large onion
• Sliced ​​pickles, ketchup and mustard, for garnish
• Salt and freshly ground pepper

Preparation:

1. Finely chop the onion in a food processor.
2. Prepare hamburger patties: Divide the ground beef into 36 portions and form into small balls. Heat a cast-iron skillet, add the meatballs one at a time, press down with a spatula, season with salt and pepper, and then sprinkle with onion. Fry on one side for 2 minutes, then flip, press down again with a spatula, and fry for another 2 minutes. Then place the buns, flat side down, on top of the patties to heat through, about a minute.
3. Prepare hamburgers: Place the patties, pickle slices, and fried onions on the bottom halves of the buns, one at a time, and drizzle with ketchup. Top with the top halves, spread with mustard.