Combine the crust ingredients except for the pecans into a medium size bowl
Beat at low speed until the mixture resembles coarse crumbs. Can also use a food processor.
Add in the pecans
Press mixture into the bottom of an ungreased 9 x 13 inch pan
Bake for 15-20 minutes or until edges are slightly browned. Don't overbake
Meanwhile, combine all filling ingredients into a medium size bowl and mix until well combined.
Pour filling over hot, partially baked crust
Continue baking for 18-20 minutes or until filling is set. Cool completely
Combine all the frosting ingredients except lime peel in a bowl and spread over cooled bars
Garnish with grated lime peel
Notes
It can be hard to get a lot of juice from key limes because of their size. You can add bottled key lime juice to what you squeeze from the zested limes if needed. I prefer Nellie & Joe's Key Lime Juice. It tastes just like fresh key limes.
Use a microplanner to zest your key limes. Sprinkle some addition lime peel over the top before serving.