1. Preheat oven to 400°F. In Classic Batter Bowl, combine sausage, mushrooms, spinach, cheese and garlic; mix well. In Small Batter Bowl, separate egg using Egg Separator; add yolk to spinach mixture, reserving egg white.
2. Roll one pizza crust into a 12 x 9-inch rectangle. Spread half of spinach mixture over dough to within 1/2- inch of edges of dough. Starting at longest side of rectangle, roll up dough, jelly-roll fashion; press seams together to seal. Repeat with remaining pizza crust and filling.
3. Place rolls, seam sides down, on Large Round Stone. Join ends of rolls to form 1 large ring; pinch together to seal. Lightly beat egg white using Egg Separator; brush over dough. Bake 25-30 minutes or until golden brown. Let stand 10 minutes before cutting. Spoon sauce over each serving.

Yield: 10 servings