Ingredients
- 1/4 cup olive oil
- 1 large onion, chopped
- 1 large green bell pepper, cut into 1/2-inch pieces
- 6 large garlic cloves, chopped
- 1 tablespoon dried oregano
- 3 15- to 16-ounce cans black beans, rinsed, drained
- 3/4 cup canned vegetable broth or water
- 1 1/2 tablespoons cider vinegar
- 1 teaspoon sugar (optional)
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