In a mini food processor, finely chop the onion, garlic, and cilantro.

Heat olive oil in a medium saucepan over medium heat. Add the chopped onion, garlic, and cilantro. Sauté until softened, about 2 minutes.

Add the undrained beans to the saucepan along with 0.75 cup of water.

Stir in the tomato sauce, diced potato, Sazon seasoning, bay leaf, oregano, and salt and pepper to taste.

Bring the mixture to a boil, then reduce heat to low, cover, and simmer for about 20 minutes, or until the potatoes are tender.

Discard the bay leaf before serving. Serve hot, optionally over rice.