1. Place a rack in the center of the oven, and preheat to 350. Lightly coat a 12 cup Bundt pan with cooking spray, then dust with flour. Shake out the excess flour. Set aside.
2. To make the cake: Place the cake mix, strawberries, applesauce, and eggs in a large mixing bowl. Blend with an electric mixer on low speed for 1 minute. Stop, and scrape down the side of the bowl with a rubber spatula. Increase the mixer speed to medium, and beat for 2 minutes longer, scraping the side down if needed. The batter should look well combined and thinkened. Pour the batter into the prepared pan, smoothing it with a spatula.
3. Bake the cake until it's light brown and springs back when lightly pressed, 45-50 minutes. Remove the pan from the oven, and place it on a rack to cool for 20 minutes. Run a long, sharp knife around the edge of the cake, and invert it onto a serving platter to cool completely.
4. To make the glaze: Mix the milk and sugar until the sugar is dissolved to form a smooth glaze. Add the food coloring, if using.
5. Drizzle the glaze over the top and sides of the cooled cake in a decorative pattern. Slice and serve.