The Hairy Bikers mackerel with red onion kebabs are great alternative to meat made on the barbecue or grilled.

The ingredients are: 8 large mackerel fillets, all bones removed, 2 tbsp finely chopped fresh oregano leaves, (or 1 tsp dried), 1 lemon, zest only, 1 tbsp red wine vinegar, 2 tbsp olive oil, pinch chilli powder or flakes (optional), 2 small red onion, each cut into wedges and lemon wedges, to serve.