Curried Monkfish with Bombay Potatoes and Pomegranate Riata

Name: Curried Monkfish with Bombay Potatoes and Pomegranate Riata
Ingredients: 1 tablespoon canola oil; 1 tablespoon chopped onion; 2 cloves garlic, minced; 700g monkfish; 1 tablespoon curry powder; 200g chopped tomato, fresh or canned; 150g plain yogurt; 4 tablespoons oil; ¼ teaspoon mustard seeds; 2 pinches chilli powder; ¼ teaspoon turmeric powder; 350g potatoes, boiled and quartered salt to taste; 150g natural yogurt; 3 scallions, finely chopped; 1 pomegranate, seeds only; ½ teaspoon salt