In a small bowl, blend mascarpone cheese, powdered sugar, vanilla and milk until smooth. Refrigerate until ready to stuff.
Heat oven to 200 degrees. Heat griddle to 350 degrees and coat with cooking spray. Cover baking sheet with aluminum foil and lightly coat with cooking spray as well.
In a bowl, whisk eggs and buttermilk. Dredge each slice of brioche into egg mixture and place onto the griddle. If you need to cook in batches, then do not dredge until you are ready to place onto the griddle.
Cook on each side for 3-5 minutes, or until lightly browned. Remove to baking sheet.
Spread four of the slices with mascarpone mixture. Layer with strawberry slices.
Bake for 4-5 minutes or until warm. Mascarpone cheese mixture may start to melt. Remove.
Serve with Dutch Honey Syrup and additional fresh strawberries. Enjoy your Mascarpone and Strawberry Stuffed French Toast!
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