Preheat oven to 350 degrees F.
Peel apples and cut into ¼ inch cubes.
In a saucepan combine butter, lemon juice and apple cubes.
Cook apples 3-5 minutes until tender.
Add cinnamon, nutmeg, and walnuts to the saucepan with the apples, cook for another 2-3 minutes.
Melt 1 tablespoon of butter.
Add brown sugar and maple syrup to melted butter.
Slowly add in 1 beaten egg into butter/sugar mixture.
Pour your sauce over your apple walnut mixture directly in the saucepan.
Place phyllo cups onto a sheet pan.
Fill each phyllo cups with about 1-11/2 teaspoons of apple walnut filling.
Place the tarts into the oven for 10-15 minutes until slightly browned on the tops.
Cool for 3-5 minutes and serve.