HEAT oven to 350ºF.
WHISK eggs and milk in large bowl until well blended. Stir in bread until completely moistened. Add spinach, bacon and 1 cup cheese; mix lightly.
POUR into 13x9-inch baking dish sprayed with cooking spray; top with remaining cheese. Refrigerate overnight.
BAKE, uncovered, 50 min. or until centre is set and top is puffed and golden brown.