I'm in the process of making a beef stew. I started cooking about 2 hrs ago, and started with some onions and garlic, browned my meat, added a little tomato paste and some spices, tossed in some mushrooms, water, and a little balsamic. Its been cooking stovetop on low to medium low since then. I kept thinking that it would just soften up over time, and similar to pot roast, brisket, etc. longer was better. BUT its totally tough, and i'm afraid is going to be dry. Is is possible I over cooked it? Is there anything I can do to save it?