Start by dicing all vegetables into uniform pieces.
In a skillet, brown the beef stew meat on medium-high heat for about 5 minutes.
Transfer the browned meat to the crockpot.
Add diced carrots, potatoes, celery, and onion to the crockpot.
Pour in the beef broth and diced tomatoes.
Add minced garlic, thyme, salt, and pepper.
Stir all ingredients to combine well.
Cover the crockpot and set it to low for 8 hours or high for 4 hours.
Once cooked, taste and adjust seasoning if necessary.
Serve hot, garnished with fresh herbs if desired.