Place all ingredients (except for the pearled barley) in the slow cooker.
½ teaspoon smoked paprika, ½ teaspoon dried thyme, 1 teaspoon salt, 1 teaspoon pepper, 1 teaspoon coriander, 1 teaspoon parsley, 1 ½ teaspoon onion powder, ½ tablespoon red pepper flakes, 1 tablespoon Italian seasoning, 1 tablespoon Better Than Bouillon vegetable, 1 bay leaf, 2 cloves garlic, ¼ cup tomato paste, 1 cup red bell pepper, 1 cup yellow onion, 1 cup frozen green beans, 1 cup frozen corn, 1 cup frozen peas, 3 carrots, 3 celery stalks, 28- ounce can of diced tomatoes, 6 cups vegetable broth