Cuban Black Beans and Rice (Frijoles Negros)

Ingredients

• 1 cup uncooked long-grain white rice
• Water, according to package directions
• Pinch of salt, optional
• 1 tablespoon olive oil
• 1 medium yellow onion, finely diced
• 1 green bell pepper, finely diced
• 3 cloves garlic, minced
• 1 teaspoon ground cumin
• 1 teaspoon dried oregano
• 1 bay leaf
• 2 cans (540 mL / 19 oz each) black beans
• ½ cup (125 mL) low-sodium vegetable broth, plus more as needed
• 1 tablespoon red wine vinegar or apple cider vinegar
• Salt
• black pepper
• Chopped fresh cilantro or parsley, optional