Did you know that Pillsbury's refrigerated sugar cookie dough is MSPI-friendly? What a great shortcut! Make sure you buy Pillsbury, because the store brands I've looked at are NOT safe.
Here's a great dessert recipe from Taste of Home to use that MSPI-friendly sugar cookie dough. It's a nice twist on traditional lemon bars. The only substitution you have to make is using dairy-free margarine instead of butter.
The bars are super rich and sweet. Don't skimp on the lemon peel; that's where you get the best lemon flavor!