In a medium sauce pan, melt butter over medium high heat.

Add onion and cook, stirring until softened about 4 minutes.

Stir in apples, sugar, raisins, vinegar, salt, nutmeg and 1/3 cup water.

Bring to a boil, reduce heat to medium and apples are tender and mixture has thickened slightly, about 8 minutes.

Remove from heat and stir in mint.