Mexican black beans

Ingredients

1 pound dried black beans, rinsed and picked over

3 tablespoons extra-virgin olive oil

1 medium onion, chopped

4 cloves garlic, chopped

1 jalapeno pepper, halved and seeded

2 teaspoons ground cumin

2 teaspoons dried oregano, preferably Mexican

Queso fresco and fresh cilantro, for topping (optional)