Whisk the egg, vanilla, cream, and cinnamon in a shallow bowl. Add a pinch of salt. Dip bread in egg mixture, turning to coat both sides evenly until the slices are moistened but not soggy. Lightly grease the pan with butter as needed. Cook bread slices until golden brown on both sides.
Sift the powdered sugar over french toast with a fine mesh strainer. Drizzle with syrup. Top with strawberries. Serve with milk.