Vegetarian Black Bean Soup Recipe

Ingredients

• 3 Tbsp. vegetable oil
• 1 large onion, chopped
• 1 stalk celery, chopped
• 1 1/2 cups dried black beans, rinsed
• 6 cups vegetable broth
• 1/2 tsp. pepper
• 1/2 tsp. salt
• 1 1/2 tsp. celery seed, divided
• 1/2 cup lemon juice