For the marinade:
2 teaspoons Dijon mustard
1 teaspoon ground black pepper
1/2 teaspoon salt
2 tablespoons canola oil

4 white fish fillets
1 onion, coarsely chopped
4 cloves garlic, roughly chopped
1 (1 inch) piece fresh ginger root, peeled and chopped
5 cashew halves
1 tablespoon canola oil
2 teaspoons cayenne pepper, or to taste
1/2 teaspoon ground turmeric
1 teaspoon ground cumin
1 teaspoon ground coriander
1 teaspoon salt
1 teaspoon white sugar
1/2 cup chopped tomato
1/4 cup vegetable broth
1/4 cup chopped fresh cilantro