24 slices day-old French bread
1 (8 ounce) package reduced-fat cream cheese, cubed
2/3 cup fat-free milk
1/2 cup reduced-fat sour cream
1/2 cup fat-free plain yogurt
1/3 cup maple syrup
1 teaspoon vanilla extract
1 teaspoon ground nutmeg
1/2 teaspoon ground cinnamon
2 cups egg substitute
2 cups fresh or frozen blueberries
confectioners' sugar