There is absolutely nothing exotic about that recipe
Everything can be found at a local store. If you don't want to pay for a whole thing of a spice you'll never use, go to sprouts. They sell in bulk so you can buy just 2 tsp of something for pennies.
1 teaspoon cumin seed
1 teaspoon coriander seed
2 teaspoons garam masala
2 teaspoons sweet Paprika
1 teaspoon hot Chilli powder
Juice of half a Lemon
2 tablespoons groundnut oil
1 teaspoon Salt
0.5 teaspoon Turmeric
1 tablespoon Tomato puree
3 Cloves Garlic crushed
Large knob of fresh root Ginger finely grated
4 Fillets halibut about 150g each, skinned
1 tablespoon tandoori paste or hot madras curry paste
1 tablespoon Olive Oil
1 teaspoon caster sugar
2 Cucumbers peeled
150 g tub Natural Yoghurt
Mint leaves, chopped
Lime juice
2 tablespoons vegetable oil
100 g baby leaf fresh