French Toast Croissant Casserole

Name: French Toast Croissant Casserole
Ingredients: 8 large croissants (cut in half lengthwise or 16 mini croissants (we buy at Trader Joe’s in freezer section)); 2 cups whole milk; 1 teaspoon vanilla extract; 1 teaspoon almond extract; 7 eggs; ½ cup light brown sugar (lightly packed); ¾ teaspoon ground cinnamon; ¼ teaspoon ground nutmeg; ½ teaspoon kosher salt; 1 cup strawberries (cut into ½ inch pieces); 1 cup blueberries; Powdered sugar (for dusting baked casserole); 1 cup maple syrup; 1 cup heavy whipping cream; 1 tsp vanilla; ¼ cup powdered sugar