<human>:  I want to make a traditional Mexican dish--could you guide me through the recipe, step-by-step?
<bot>: Step 1: Start by heating a tablespoon of oil in a medium-sized skillet over medium heat.Step 2: Once the oil is hot, add diced onions and garlic and cook until the onions are translucent, about 4-5 minutes.Step 3: Next, add 1-2 lbs of diced beef to the skillet, stirring until it is fully cooked.Step 4: Now, add a can of diced tomatoes, a teaspoon of chili powder, and a pinch of cumin, stirring to combine.Step 5: Simmer the mixture for 10-15 minutes, stirring occasionally.Step 6: Add 2-3 cups of cooked beans (black or pinto) to the mixture, as well as 2-3 cups of cooked, cubed potatoes, stirring well to combine.Step 7: Cover the skillet with a lid and simmer for an additional 10-15 minutes, or until the potatoes are tender.Step 8: Serve the traditional Mexican dish with a sprinkle of shredded cheese on top, as well as freshly chopped cilantro, tomatoes, and onions, if desired. Enjoy!