Chop the ingredients for the salad. Cut the cucumber and tomato into thin slices. Cut the onion into rings, cut the bell pepper into strips. Tear the lettuce leaves.
Prepare the dressing. Place the garlic and half a lemon in a bowl. Add olive oil, soy sauce, wasabi. Mix well and let the sauce sit for 10 minutes.
Assemble the salad. Place the trout slices, cucumber, tomato, lettuce, onion and bell pepper in a deep bowl. Pour the dressing over. Cover with a second bowl and shake well several times.