Preheat oven to 400 degrees Farenheit.
Place broccoli and cauliflower in boiling water for 3 minutes, then drain off water and set vegetables aside.
In a blender, blend soy milk, oil, flour, yeast flakes, salt and nutmeg until smooth. Place blended ingredients in a 3-quart saucepan. Heat sauce on medium heat until hot and thickened, stirring often.
In a 8x8-inch baking dish, combine the broccoli, cauliflower, and sauce. Sprinkle cheese and almonds on top.
Bake, uncovered, for 10 minutes.