Place all vegetables (carrots, potatoes, celery, green beans) in the crockpot.
Add the diced tomatoes with their juices and the vegetable broth.
Sprinkle the thyme, oregano, salt, and pepper over the top and stir gently to combine.
Cover and cook on LOW for 6 hours or HIGH for 3–4 hours, until the vegetables are tender.
Stir before serving and adjust seasoning as needed. Serve hot with crusty bread.
Notes
This vibrant vegetable stew is a cozy and healthy slow-cooker meal. Customize by adding beans or spinach in the last hour of cooking for more protein and greens.