Heat oven to 400 degrees F. Combine potato, egg white and half of shallots. Press mixture into an oiled pie pan. Bake for about 15 minutes, until edges are brown.
Heat a skillet over medium heat. Cook sausage. Add apple and remaining shallots, cooking until apples are tender but not falling apart. Add maple syrup and toss with sausage and apple mixture. Place sausage mixture on potato crust and spread out evenly. Sprinkle cheese substitute, if using over filling. Sprinkle on greens. You can also mix greens in with sausage filling, if you prefer.
Beat eggs and egg yolk with salt and pepper to taste. Carefully pour eggs over filling. Bake until eggs are set, about 25 minutes.
Freezing Directions: Allow to cool. Wrap well in freezer safe wrap, label and freeze.
To serve: Thaw and heat through.