To roast your squash toss it with 2 Tbls of olive oil ,salt and pepper Place on a sheet pan and roast in a preheated 375° oven till tender ,approximately 40 minutes.
In a large pot cook ginger, onion, turmeric and celery in remaining olive oil until fragrant and tender. Add liquid simmer and 1 hour. Add chic peas + roasted squash cook 30 minutes or longer. Take 2 cups of your soup and puree in blender add back to pot . You now have a creamy but chunky soup.You may want to add more water if soup is too thick. Season with salt and pepper.