Unroll dough, separating into strips. Working on a flat surface, coil one strip of dough around itself in a spiral pattern. Add second strip of dough to the end of the first strip, pinching ends together to seal; continue coiling dough. Repeat procedure with remaining dough strips. Cover dough with a towel; let rest 20 minutes. Roll dough into a 13-inch circle; fit into a 9-inch pie plate coated with cooking spray. Fold edges under; flute. Sprinkle cheese over bottom of crust. Top with crabmeat; set aside.
Preheat oven to 375°.
Coat a large nonstick skillet with cooking spray; place over medium-high heat. Add onion; sauté 4 minutes. Add spinach and next 4 ingredients (spinach through pepper); cook 2 minutes or until spinach wilts. Arrange spinach mixture over crabmeat.
Combine milk and egg substitute; stir well with a whisk. Pour over spinach mixture. Bake at 375° for 45 minutes or until a knife inserted in center comes out clean; let stand 10 minutes. Garnish with cherry tomatoes, if desired.