This is a tried and true recipe I got from Terrie Carcello. The nice thing is this is a basic recipe that you can customize (ideas are included).
6 c oats
3 c whole wheat flour
1/2 c water
1 T salt
1 c olive oil (trust me on this)
1 c honey
Mix all these things together in a large bowl. At this point you can add nuts, coconut, cinnamon, vanilla, etc.
Put this out on a cookie sheet and bake at 250 for 50 minutes, "turning" it in the pan with a spatula 4 times during the 50 minutes.
At this point you can add dried fruit if you like it (suggestions: raisins, dates, apricots, cherries, cranberries, blueberries, etc)
My favorite way to make it is with vanilla, almonds, and cherries. Cool completely and store in a large zip lock bag or plastic container with lid.