In a medium saucepan, combine sliced strawberries (keep ½ cup aside for topping), 1 tablespoon sugar, 1 tablespoon cornstarch, 2 tablespoons water and ½ tablespoon lemon juice.
Heat over medium heat until mixture begins to simmer.
Stir frequently for about 5 minutes or until filling thickens. Remove from heat.
Repeat this same process with the blueberries. Combine blueberries (keep ½ cup aside for topping), 1 tablespoon sugar, 1 tablespoon cornstarch, 2 tablespoons water and ½ tablespoon lemon juice.
In a large mixing bowl, use a hand mixer to beat together cream cheese, evaporated milk and ⅔ cup sugar until smooth.
Fold in angel food cake cubes until they are completely coated with the cream mixture. Set aside.
In a small mixing bowl, whip together heavy whipping cream and powdered sugar until it forms peaks.
Place half of the cake/cream mixture in a 9x13-inch baking pan.
Spoon half of the strawberry filling and half of the blueberry filling over top.
Spread half of the whipped topping over the berries.
Repeat layers (cake/cream, fruit filling, whipped topping).
Garnish with remaining fresh strawberries and blueberries.
Chill for two hours prior to serving.