Open the tomatoes, black beans and corn cans. Drain the corn. Set aside.
Heat the olive oil in the pot over medium-high heat.
Add the onion and serrano peppers and cook, stirring constantly until the onion is soft. Then add the tomatoes and cook for 5 minutes.
Incorporate the black beans (with the juice from the can) and the drained corn. Add salt and pepper to taste.
Cover the pot and simmer for 12-15 minutes until all flavors are deliciously combined.
