Cut the chicken fillet into small equal pieces. Pour water into a saucepan, put the meat in and place on medium heat. Cook the bird for 30-40 minutes.
Clean the sweet peppers from seeds, remove the stalk. Cut the peppers into segments. Preheat the oven to 200˚C, put the peppers in a baking dish and cook in the oven for 3-5 minutes.
In a large, deep bowl, combine sour cream, mayonnaise, pesto, vinegar, garlic, basil and green onions.
Place cucumbers, peppers, cherry tomatoes, chicken fillet, olives and croutons in a salad bowl. Season with salt and pepper to taste. Pour the resulting sauce over and mix well.