Chai spiced winter squash puree

From myrecipes.com

10 c peeled butternut or other winter squash, cut in 1" cubes
2 T olive oil
1/2 t salt
1/4 t cinnamon
1/4 t pepper
1/8 t ground ginger
1/8 t ground cardamom
1/8 t cumin
dash of white pepper
dash of ground cloves
2 large shallots, peeled and quartered
1 large onion, cut in 1" pieces
1/4 c water
1 T brown sugar

Combine all but water and sugar, tossing well to coat.  Place on lined jelly roll pan and bake at 375 for 50 minutes or until tender.  Process with water and brown sugar in a food processor or blender until smooth.