Finely dice the onion and bell pepper. Mice the garlic, chop the coriander leaves and jalapeno. If using canned black beans, rinse and set a side.
In a wide skillet heat the oil and add the cumin seeds. Let them sizzle for 30 seconds. Now add the garlic and jalapeno and cook for a minute.
Now add the onion, bell pepper and little salt. Cook for five minutes or till soft.
Add the tomato paste, cumin powder, chili powder and taco seasoning. Mix everything and cook for five minutes.
Add the rice, salt, coriander leaves and a squeeze of lime juice. Mix until all the rice is incorporated in to this spice mixture.
Mexican rice is ready to be served.