Quick Pickled Irish Vegetable Salad

Ingredients

• 2 carrots (thinly sliced on the diagonal (or you could use a mandolin))
• 2 celery sticks (trimmed and thinly sliced on the diagonal)
• juice and finely grated rind of 1 small lemon
• 3 tablesp. extra-virgin olive oil
• 1 butterhead lettuce
• 3 radishes (very thinly sliced)
• good handful fresh mixed herbs (such as parsley, dill, basil, mint or chives)
• 1 tablesp. wholegrain mustard
• sea salt
• freshly ground black pepper
• 120 ml apple cider vinegar
• 4 tablesp. sugar
• 2 teasp. sea salt
• 2 tablesp. coriander seeds (lightly cracked)
• 1 red onion (very thinly sliced)