Place the pearl barley, vegetable broth, diced onion, sliced carrots, chopped celery, cubed potatoes, diced tomatoes, minced garlic, dried thyme, bay leaf, salt, and pepper into the crockpot.
Stir everything together until the ingredients are evenly distributed.
Cover and cook on low for 6 to 8 hours until the barley is tender and the stew has thickened.
Remove the bay leaf, then stir in the fresh spinach until it wilts just before serving.
Notes
Add a splash more broth when reheating leftovers because the barley continues to absorb liquid in the fridge. Frozen spinach works in place of fresh if that is what you have on hand. The potatoes help stretch the recipe further without adding much cost.Course: Soup
Cuisine: American
Equipment: Slow Cooker, Cutting Board, Knife