Peel 2 onions and chop finely. Heat 1 tbsp. sunflower oil in a frying pan, fry the diced onions for approx. 1 minute, remove from the pan and allow to cool.
Knead minced meat, diced onion and tomato paste, season with salt and pepper. Shape into 4 meatballs of the same size. Heat 2 tablespoons of sunflower oil in a large frying pan. Fry the meatballs for about 8 minutes while turning.
Meanwhile wash parsley, shake dry, pluck off leaves and chop finely. Peel and finely chop 1 onion. Mix with parsley and olive oil, season with salt and pepper, put aside.
Wash the tomatoes, dab dry and quarter them. Peel the red onion and cut into fine rings. Wash lettuce and shake dry.
Peel the shrimps, except for the tail fins, and remove the intestines. Wash the shrimps, dab dry. Heat 2 tablespoons of sunflower oil in a frying pan, fry the prawns for 4-5 minutes, season with salt and pepper and remove from the pan.
Halve the avocado, remove the stone, remove the flesh from the skin and cut into slices. Arrange meatballs on salad, add avocado, onion rings, tomatoes and parsley and onion salsa.
Put 3-4 prawns each on 1 wooden skewer and put them into the meatballs.