Tuna, rocket & tomato salad

Ingredients (serves 4): 1 x 425g can tuna in springwater, drained 1 x 400g can cannellini beans, rinsed, drained 2 ripe tomatoes, coarsely chopped 1 red onion, halved, thinly sliced 60g drained pitted kalamata olives, halved lengthways Salt & freshly ground black pepper 1½ tbs olive oil 2 bunches rocket, trimmed, washed, dried 12 fresh…