Preheat the oven to 350°F and prepare a baking sheet with parchment paper.
In a sizable bowl, blend the apple slices with melted butter, brown sugar, cinnamon, nutmeg, vanilla essence, and a pinch of salt. Mix until every apple slice is evenly coated.
Distribute the coated apple slices onto the lined baking sheet in a single layer, ensuring they do not overlap.
Bake in the preheated oven for about 20 to 25 minutes until the apples are tender and lightly caramelized.
Remove from the oven and serve the warm apple slices right away. Add ice cream or whipped cream if desired. Enjoy your delicious dessert!