Wash the oak leaf salad and pluck into bite-sized pieces. Wash the sprouts and let them drip off. Wash, quarter and seed the tomatoes. Cut flesh into small cubes. Cut trout fillets into smaller pieces. For the vinaigrette, peel and finely dice the onion. Wash and chop the dill.
Season vinegar with salt, pepper and sugar. Add 2 tablespoons of water and oil. Stir in dill and onion. Arrange the prepared salad ingredients on plates. Pour vinaigrette over them. Serve garnished with dill and lemon