Boil potatoes and garlic cloves in water until tender. Drain and set aside.
Add a teaspoon of oil to a medium sized pot. Turn to medium heat and add seeds. When they make a "popping" sound, add the potatoes and garlic cloves, along with cilantro that has been loosely torn. Mix together for a few minutes then set aside.
On low heat, add the rest of the oil and chopped onions. Fry until transparent. Add tomatoes and bell pepper. Fry until the tomatoes are tender and done.