Butternut Squash with tofu

2 tablespoons unsalted butter 1 cup diced red onion 6 cups butternut squash - peeled, seeded, and cut into 1-inch cubes 2 sweet potatoes, peeled and cut into[...]

3 lbs butternut squash (or pumpkin) 3 tablespoons vegetable oil 2 leeks , chopped 3 celery ribs , chopped 4 teaspoons ginger , peeled and minced 6 cups[...]