Martha's Dutch Baby Pancake

Preheat oven to 425 degrees. In a medium bowl, lightly beat flour, milk, eggs, nutmeg, and salt until just combined. Batter will be slightly lumpy.

Melt butter in a 10-inch cast-iron skillet over medium-high heat. Add flour mixture and transfer to oven. Bake until pancake is golden brown, 15 to 20 minutes.

Sprinkle pancake with sugar and return to oven for 2 to 3 minutes. Remove from oven and sprinkle with lemon juice; serve immediately with jelly, jam, or marmalade.