Remove the stems and seeds from the dried chilis and soak them in warm water for 10 minutes.
Place the soaked chilis, tomato, onion, garlic, cumin, vinegar, salt, and pepper into the blender. Add ½ cup of the soaking water and blend until smooth.
Place the cubed chicken breasts in bowl or zipper bag, add the sauce, and mix to coat evenly. If using a bowl, cover with plastic wrap. Marinate in the refrigerator for at least 2 hours to overnight.
Heat the oil in a large skillet over medium-high heat and sear the chicken pieces until lightly browned on all sides, about 5-6 minutes.
Pour in one cup of water, two bay leaves (fresh or dried), ¼ cup of the marinade, and ½ teaspoon salt. Bring to a boil, reduce the heat and simmer, covered, for 30 minutes, stirring twice in between.
Add the cubed potatoes and cook for an additional 15 minutes, stirring occasionally, until the potatoes are cooked through. Check the seasoning and add more salt if needed.
Add the cubed potatoes and cook for an additional 15 minutes, stirring occasionally, until the potatoes are cooked through. Check the seasoning and add more salt if needed. Serve with a side of cooked white rice, steamed veggies, or salad.