Baked Apples

Ingredients:
4 golden apples (you can also use Fuji or Gala apples)
5 tablespoons (70 grams) softened butter
1/3 cup (73 grams) brown sugar
1 teaspoon ground cinnamon
1/4 teaspoon ground nutmeg
A pinch of ground cloves
The zest of 1 orange
1/3 cup of chopped walnuts
1 small lemon