Return pan to medium heat and add oil. Then, add onion, bell pepper & kosher salt. Sauté, stirring occasionally, until the onion is starting to turn translucent and tender, about 4 minutes. Add in garlic, stir, and cook for 1 more minute.
1 tbsp olive oil, 1 green bell pepper, ½ small yellow onion, 2-3 garlic cloves
Then, add in the black beans, salsa, cumin and more kosher salt to taste. Stir, then use the back of your spatula to smush some of the black beans -- they don't have to all be mashed though. Allow it to cook for a minute or two longer, until the beans are warm. Remove from pan and set aside.
1 can black beans, ½ cup salsa, ½ tsp cumin, kosher salt