Make Madras paste by combining the cumin, coriander, turmeric, chili powder, garlic, ginger, salt, pepper, and lemon juice in a bowl.
2 tbsp ground coriander, 1 tbsp ground cumin, 1 tsp turmeric, 1 tsp chilli powder, 2 cloves garlic, 2 ½ tbsp lemon juice, Sea salt and freshly ground black pepper, 1- inch piece of fresh ginger