In a saucepan, heat the canola oil over medium heat.Add the garlic,stir constantly for 30 seconds.
Add the chorizo and potatoes the pan and cook until crispy,stirring occasionally, 4-5 minutes.
Add the black beans and chicken stock to the pan, add milk and salt, pepper,stirring occasionally, until black beans are tender, 25-30 minutes.add scallions minced.