The first surprise here: there's not a grain of sugar in these cupcakes. The second surprise: your kids will love them anyway.
Heat the oven to 375 degrees. Line 12 muffin tin cups with foil bake cups.
In a large bowl, mix together all of the meat loaf ingredients until well combined. Divide the mixture evenly among the lined cups (the liners should be about three quarters full).
Place the filled muffin tins on cookie sheets and bake the cupcakes for about 15 minutes or until cooked through.
Divide the mashed potatoes among three small bowls and stir a few drops of food coloring into each batch to create blue, yellow, and pink pastel frostings. Spread a generous dollop on each cupcake. Makes 12 cupcakes.