Take frozen green beans and cook them in salted boiling water for 3-4 minutes. Drain and let cool. While the beans are cooling, cut the red fish into cubes.
Chop tomatoes, bell peppers and chilled green beans.
Next, combine all the ingredients, add arugula leaves (this will emphasize the taste of tomatoes and fish, make the salad more interesting).
Season with olive oil and lemon juice. If desired, add black pepper and salt.