The oil is heated in a deep pan for a few minutes. Add the cumin, bay leaves, chopped onion, crushed garlic and ginger paste. Mix well and fry until the onion becomes golden. Then add cayenne, garam masala, coriander and turmeric. Mix well and leave for a few minutes to absorb flavors. Add the finely chopped chillies, chopped peeled tomatoes and peas. Add salt to taste, then pour 2-3 cups water and curry powder to the boil, then reduce heat and let simmer until ready. Before you remove from heat and add the feta cheese - cut into small cubes and simmer for a few minutes.