First, cut the sausage, cheese and cucumbers into narrow 2-3 cm strips, onions into rings and peppers into small cubes. Mix the peppers, cheese, sausage and cucumbers in a large bowl.
Mix the marinade sauce with vinegar, oil and cucumber water. Season with salt, pepper and sugar. Pour the sauce over the salad and mix well.
Put the onion rings on the salad. Garnish the sausage salad with lettuce leaves at the end.