Peel and cut cucumber in small cubes. Halve the cherry tomatoes. Cut the radishes in circles and thinly slice the sweet bell peppers.
Toss the ingredients into the serving bowl and add ruccola (or use any of your favourite greens - bean tendrils, pea sprouts, spinach). Sprinkle with some lemon juice and olive oil. Season with a bit of salt and pepper. Mix and serve.