**Ingredients:** - 2 pounds (907 grams) beef short ribs, cut into 3-4 inch pieces - 1 large onion, sliced - 3 carrots, sliced - 3 stalks celery, sliced - 8 ounces (227 grams) mushrooms, quartered - 4 cloves garlic, chopped - 1 pinch red pepper flakes (optional) - 3 cups (710 milliliters…