1. Prepare rice according to package directions.
2. Sauté onion and next 3 ingredients in hot oil in a large Dutch oven over medium heat 5 minutes. Add squash, broth, and 2 tablespoons chopped fresh sage. Bring to a boil, reduce heat to medium-low, and cook 25 minutes or until squash is tender. Let cool 10 minutes.
3. Process squash mixture, in batches, in a blender until smooth, stopping to scrape down sides as needed. Return mixture to Dutch oven, and stir in evaporated milk, salt and pepper to taste, and, if desired, 1 tablespoon chopped fresh sage. Serve soup in individual bowls with a scoop of brown rice.