The balance of oil to vinegar is generally one of the distinguishing features of a classic French dressing, where it is often assumed as a ratio of 6 to 1, compared to the more astringent version I prefer to make of 3 to 1. Of course it is down to personal opinion and like with any dressing it is important to taste as you go along. What I love about this rather simple potato salad is the warm potatoes soak up the tangy mustard oil and the radishes and lettuce leaves are left glossy and gleaming. Good as a supper in itself or as a side dish to grilled meats or fish.
For the salad:
800g of baby potatoes
1 large bunch of radishes, leaves and stalks removed
4 heads of baby gem lettuce, broken into leaves
1/2 onion, very finely sliced, optional
For the dressing:
6 tbsp of extra virgin olive oil
1-2 tbsp of white wine vinegar
1 heaped tsp of Dijon mustard
1 garlic clove, finely chopped
Sea salt and ground black pepper