Preheat the oven to 350 degrees Fahreneheit.

Wrap sweet potatoes in foil. Place in a baking pan and bake for about an hour, until soft. Carefully remove foil and remove peel.

Place the cooked, peeled sweet potatoes into a mixing bowl. Add egg, egg white, orange juice, soy milk, cinnamon, nutmeg, and salt. Mix well.

Place in a 9- or 10-inch round baking dish and bake for 25 minutes.

Meanwhile, prepare the broccoli layer.

In a large pot, cover broccoli with water and bring to a boil. Boil until broccoli is very soft, about 15 minutes.

In a medium bowl, combine broccoli, egg whites, light mayonnaise, soy milk, onion powder, salt, garlic powder, and pepper.

Layer over sweet potato layer and use a spatula to smooth the top.

Return baking dish to the oven and bake for an additional 45 minutes.