Masala Sauce - cooking recipe

Ingredients

7 ounces canned tomatoes
4 fluid ounces yogurt
4 fluid ounces coconut milk
2 green chilies, chopped
1 onion, sliced
3 garlic cloves, crushed
2 tablespoons ghee or 2 tablespoons butter
2 tablespoons lime juice
1 tablespoon black onion seeds (nigella)
1 tablespoon fresh cilantro, chopped
1 tablespoon of fresh mint, chopped
1/2 teaspoon garam masala

Preparation

Heat the ghee on a moderate heat in a medium-large pan.
Add the onion slices and cook gently for about 5 minutes.
Add the black onion seeds, chopped chillies and the crushed garlic cloves and stir the ingredients together with the onions.
Cook for 2 minutes.
Add the tomatoes, yogurt and coconut milk and bring to a boil.
Reduce the heat to medium and simmer gently for 20 minutes, stirring occasionally.
Add the garam masala, chopped coriander, mint and lemon or lime juice and stir well.