- Preheat oven to 350oF. Lightly grease 3-quart oven-safe casserole (8 x 10-inch or similar) with ½ tablespoon butter. In large bowl, whisk together egg yolks, buttermilk, cream, ⅓ cup syrup, vanilla and salt; reserve.
- On ungreased rimmed baking pan, spread waffle pieces in even layer and bake for 12–15 minutes or until crisp and lightly toasted. Increase oven temperature to 375oF
- Add waffle pieces and bacon to buttermilk mixture and toss to coat evenly. Pour into prepared casserole and tightly cover with foil.
- Bake for 45-50 minutes and remove foil. Melt remaining butter and brush over top of casserole and bake, uncovered, for another 10-15 minutes or until top is crisp and toasted. Top with fresh berries and remaining maple syrup, dusting with powdered sugar if desired, and serve warm.