Tandoori Fish on the BBQ

Name: Tandoori Fish on the BBQ
Prep time: 10 min
Cook time: 15 min
Total time: 25 min
Cuisine: Indian
Ingredients: 1 large sea bass or other fish of your choice; 3 tbsp Greek yoghurt; 1 tsp rapeseed (canola) oil; Juice of one lemon; 2 cloves garlic – finely chopped; 2cm (3/4 inch) ginger, finely chopped; 2 green finger chillies, finely chopped or smashed into a paste; 1 tbsp tandoori masala powder; salt and pepper to taste; 1 lemon, thinly sliced (optional)