Freeze individual-size servings of your beef stew, and turn leftovers into a great lunch or dinner.
Slow-Cooker Variation: Place beef in a 5-quart slow cooker. Distribute tomato paste, vinegar, and flour over beef; season generously with salt and pepper. Add onions, potatoes, carrots, garlic, and bay leaves. Cover slow cooker; cook on high until beef is fork-tender, about 5 hours (or cook on low heat 8 hours).