Preheat oven to 425 degrees.
Whisk flour, milk, butter, eggs, nutmeg and salt in a medium bowl until smooth.
Generously butter a 9-inch square baking dish.
Pour batter into baking dish and sprinkle 2 tablespoons of sugar gently and evenly over the top.
Bake for 10 minutes at 425 degrees, then reduce the heat to 350 and bake an additional 25 minutes, until the top is puffy and browned.
While the popover is cooking, combine cherries and sugar in a microwave safe bowl.
Microwave on high for two to three minutes, stirring once, until cherries are thawed and begin to form their own sauce with the sugar.
Remove popover from the oven and cut into pieces.
Spoon on cherry sauce and whipped topping and serve immediately—or your popover will become a pancake!