Cut the bacon into fine strips and fry until crispy in a pan, remove. Wash the chicken fillets and pat them dry. Fry in the bacon fat on each side for about 4 minutes until golden brown.
Season with salt and pepper, let it cool down and cut it into 1 cm wide pieces. Clean, wash, quarter and seed the peppers and also cut them into 1 cm wide strips. Clean, wash, drain and cut iceberg lettuce into bite-sized pieces.
Peel and finely chop the onion. Mix vinegar, 1 teaspoon salt, pepper and sugar. Whip the oil into it. Stir in diced onion and bacon strips. Mix all salad ingredients in a bowl, pour the marinade over it and let it stand for a short time.