Butternut Squash With Pistou without pumpkin cinnamon

2 lbs butternut squash, see note 2 large celery ribs , chop 2-inch pieces 2 tablespoons water 1 1/2 cups thinly sliced leeks or 1 1/2 cups coarsely chopped[...]

1 tablespoon olive oil 3 garlic cloves , minced 1/4 cup fresh basil , chopped (or 4 tsp. dried) 2 tablespoons fresh parsley , chopped (or 2 tsp. dried) 2[...]