Step 1

Combine the Dressing ingredients in a jar and shake well. Set aside - or refrigerate up to 2 days. Bring to room temperature before using.

Step 2

Bring a large pot of salted water to boil. Add the beans, bring it back up to a boil and boil beans for 60 seconds - no more!

Step 3

Drain and plunge in ice cold water (or run under cold tap water) to stop them from cooking.

Step 4

If making ahead, leave in the colander to dry before transferring to the fridge.

Step 5

To serve, pile the beans on a plate, top with tomato and red onion, drizzled over dressing. Sprinkle with parsley if using.