In a large wok or skillet, add the oil and melt it over medium heat. Stir in the onion and garlic, along with a pinch of salt, and sauté for about 5 to 6 minutes, until softened.
Stir in the diced tomatoes, chili powder, garlic powder, dried oregano, cumin, and salt. Continue sautéing for another 3 to 5 minutes (increasing/reducing heat if necessary), until the tomato softens.
Now stir in the salsa and drained and rinsed black beans. Cook for a few more minutes until heated throughout. Taste and add more salt if desired.
(recipe inspired from Oh She Glows)