Warm Ray Wing with Coriander from Darina Allen's Simply Delicious Suppers by Darina Allen

Ingredients

• 1 medium ray wing
• 1 teaspoon coriander seeds
• 1–1½ tablespoons green spring onion (scallion) cut at an angle
• 2–3 sprigs of parsley
• 2–2½ tablespoons white wine vinegar
• pinch of salt
• 2–2½ tablespoons sunflower or arachide oil
• 4–5 tablespoons olive oil
• 2–2½ tablespoons sherry vinegar or balsamic vinegar
• 1 onion, sliced
• ½ teaspoon Dijon mustard
• salt and freshly ground pepper