Core apples; cut into 1/2-inch wedges, keeping peels for structure.
Melt butter in a 12-inch skillet over medium heat 2 to 3 minutes until nutty-smelling with amber flecks.
Add apples; cook about 6 minutes, turning every few minutes, until cut faces start browning.
Stir in brown sugar, cinnamon, nutmeg, and salt until sugar melts around slices.
Add lemon juice and cider. Cover; cook 3 to 5 minutes until a knife meets slight resistance in a slice center.
Uncover; toss 1 minute until sauce is glossy, not watery. Serve warm.