Add butter to large stock pot over medium-high heat. Once melted, add garlic and seasonings. Saute for 3 minutes, then add carrots and celery. Cook another 5 minutes.
Add three quarters of green onion, potatoes, chickepeas and broth. Bring just to a boil then reduce heat to medium. Cover and cook for 20 minutes.
Add in sausage and cover again. Let cook for remining 15 minutes. Serve with a sprinkle of remaining green onions.