Preheat an oven to the warm setting (or 100 degrees) to keep the French toasts warm while they are all cooking. Heat mashed strawberries and 1/2 cup white sugar in a saucepan over medium heat.
Mix the cornstarch and water together in a bowl, then stir into the strawberries.
Cook and stir until thickened, about 5 minutes. Reduce heat to low and simmer while preparing remaining ingredients, stirring occasionally.
Whisk together the milk and eggs in a bowl; set aside.
Mix the cream cheese, vanilla extract, and 3/4 cup white sugar in a bowl until smooth.
Spread the cream cheese mixture over a half a piece of bread, and top with another piece. Repeat with remaining bread and cream cheese mixture to make 8 half sized sandwiches.
Heat butter in a large skillet over medium heat.
Dip the sandwiches into the egg mixture, 2 or 3 at a time, and place in the skillet. Cook until golden brown on both sides, about 3 minutes per side.
Transfer pan-fried sandwiches to a baking sheet and place in the preheated oven to keep warm while cooking remaining sandwiches.
To serve, top French toast with warm strawberry glaze and sliced fresh strawberries and sprinkle with confectioners sugar. Serve with whipped cream.