Grind the freeze-dried strawberries to a fine powder in a food processor or spice grinder. Whip the cream cheese until smooth and fluffy. Mix the strawberry powder into the cheese and set aside. Place the egg whites and cream of tartar in the bowl of a stand mixer. In a small pot, mix the sugar and water. Place the pot over high heat. Stir the mixture until the sugar dissolves. Do not stir the syrup after it begins to boil. Once the syrup is boiling, whip the whites until foamy. Boil the syrup until it reaches 240 degrees. Remove the syrup from the heat and cool for 1 minute. With the mixer running at medium-low speed begin pouring the syrup in a thin steady stream into the whites. Continue mixing until all the syrup has been added. Turn the speed to high until the whites reach full volume. Continue mixing until the meringue has completely cooled.