White Bean Nicoise Salad (adapted from The First Mess blog) - AMY'S GARDEN

Ingredients

• 1 medium spring onion, peeled and thinly sliced
• 3 tablespoons white wine vinegar
• sea salt and ground black pepper, to taste
• 1 1⁄2 lbs mini potatoes
• 1 tablespoon capers
• 1 teaspoon grainy mustard
• 1⁄3 cup extra virgin olive oil
• 1⁄2 cup cooked white beans (I like to use canned garbanzo beans)
• 1 stalk celery, fine dice
• 1⁄2 lb green beans, ends trimmed
• 4 radishes, thinly sliced
• 1⁄4 cup finely sliced chives or spring onion greens
• 1⁄4 cup finely chopped flat leaf parsley