Butternut Squash Soup without walnuts

1 1/2 pounds butternut squash or other winter squash 3/4 teaspoon olive oil or canola oil 3 stalks celery chopped * 2 small onion diced 2 small carrots diced[...]

1/2 cup onion 2 tablespoons butter or margarine 2 cups chicken broth 1 pound butternut squash pared, seeded and cut into 1inch cubes 2 each pears pared and[...]