Heat a saucepan over medium heat with the olive oil, cumin and garlic, stirring continuously until fragrant, about 30-60 seconds.
Add the black beans, tomato sauce, and cilantro.
Turn the heat down to medium and simmer until thickened to desired consistency, seasoning with salt and pepper if needed. We like about 30-40 minutes, but less is great too.
Serve with a little extra cilantro.
