I'm doing beef stew in a slow cooker. When cooking slabs of meat (e.g. steak), I can check doneness with a meat thermometer, but I'm not sure that method really applies in a stew. The broth will heat faster than the meat, presumably, and I don't think I can get a good reading off a 1" beef chunk.
How do I tell when a stew is done? I've had bad experiences trusting to just a timer.