1 cans tuna fish (in water) drained
1 bunch arugula
2 cans cannellini beans, rinsed and drained
6 oz French beans, trimmed, blanched and refreshed
1 bunch spring onions, washed, trimmed and finely cut on diagonal
Salt and pepper

Dressing:
4 tablespoons olive oil
2 teas grainy mustard
Grated zest and juice of 1/2 lemon
Salt and Pepper

Make dressing and season well. Toss tuna fish and arugula together. Add dressing to beans and spring onions, mix well. Add to tuna and arugula and stir together gently.