The grated peel of the lemon has traditionally been used extensively in cooking. We can think of the following possible applications: in bakery products, as filling for olives, in icecreams for some chewy bits,... maybe you can come up with some more.

The peelflakes have a high content of fibre, but also other good things like flavonoids,...

The peelflakes have a high content of fibre (helps in weightloss & improves the intestinal transit), but also considerable quantities of flavonoids (antioxidants).-