Apple cranberry walnut oat crumble for a picnic

I went for a picnic a couple weeks back with some of my girlfriends. They requested that I make the dessert, and I was okay since you know, I love to bake. And the girl pals are not a big fan of sweet, so they requested something fruity, preferably a fruit crumble. So, I decided to make an apple crumble. And add in frozen cranberries(which are tart) that I had frozen when they were in season  to make the dessert less sweet.

Apples, cranberries, walnuts and oats.