Baked French Toast with Blueberry Sauce

Slice bread into 12 to 14 slices about 3/4-inch thick.

Place on a 10 1/2 x 15 1/2 x 1-inch cookie sheet.

Whisk egg, milk, baking powder and vanilla together and slowly pour it over the bread, turning to coat the bread completely.

Cover with plastic wrap and refrigerate for 1 to 2 hours or overnight.