Asian Malai Egg dish #rumblr

4 hard-boiled eggs, peeled and halved
1 tablespoon oil
1 onion, chopped
2 cloves garlic, minced
1 inch ginger, minced
1 teaspoon turmeric powder
1 teaspoon coriander powder
1/2 teaspoon cumin powder
1/2 teaspoon garam masala powder
1/4 teaspoon cayenne pepper (optional)
1/2 cup water
1/4 cup heavy cream
Salt to taste
Cilantro leaves, for garnish