Fennel and Orange Salad (Side)

Ingredients (side salad) 2 oranges 1 fennel bulb - Finely Sliced (I use a mandolin - very carefully) 1/2 medium red onion, finely sliced 1 tbsp loosely packed parsley leaves Orange Dressing 50ml olive oil 40mls fresh orange juice - Or juice from 1 orange 1 tsp wholegrain mustard Salt & ground black pepper Rind from 1 Orange