Bean, pea and lentil salad

Name: Bean, pea and lentil salad
Prep time: 25 min
Cook time: 30 min
Total time: 55 min
Cuisine: European, Mediterranean, French
Ingredients: 1 cup French-style lentils; 4 cups water; 200g trimmed green beans; 200g trimmed sugar-snap peas; 1 cup frozen peas; 1 finely chopped red onion; 100ml olive oil; 2 tbs lemon juice; ¼ cup coarsely chopped mint