Take a large pan.

Add the oil and onion into the pan.

Cook the onion and add the spices and garlic into the mixture.

Cool it down once it is cooked.

Take a large bowl.

Add the cream and beat it properly.

Make it frothy and then add the butter.

Beat the mixture properly and then add the onion mixture in the butter.

Mix the mixture properly.

Lay the tart dough into greased tart dishes.

Bake the dish properly for ten to fifteen minutes.

Add the chopped cilantro on top.

The dish is ready to be served.