Meanwhile chop dates in a food processor until pureed into a sticky ball; add to oatmeal. Heat nut butter and sweetener in a small saucepan over low heat until hot, whisking to combine. If adding a Flavoring, whisk it in now. Add to oatmeal and dates, along with nuts and dried fruit of choice. When cool enough, mix with hands to thoroughly combine. Turn into prepared pan, using oiled fingertips to press mixture, more or less, into pan. Sprinkle chocolate chips evenly over mixture and use a drinking glass bottom or similar item to press chips into bar mixture and level it to even thickness. Can be refrigerated or frozen, but bar mixture is solid enough at this point to remove from pan and cut into 12 bars by halving and then cutting each half into sixths.