1. Heat oven:400 degrees
2. Arrange rack in the middle.
3. Combine broth,rice,squash,puree,and onion,in 3 quart baking dish.
4. Season with salt and freshly ground pepper.;stir to combine well.
5. COVER TIGHTLY with aluminum foil and bake,stirring occassionally,until most of the water has been absorbed.
6. ,and rice granules are puffed,about 30-35 minutes.
7. remove from oven,stir in remaining ingredients,season to taste and serve.