Using a 4-inch (10 cm) flower-shaped cookie cutter, cut out as many flower shapes as possible. Ball up and roll out any remaining dough to make more flowers.
4. Step
Press flowers into a greased mini muffin tin, so that the petals fall on the outside of the mold.
5. Step
Prick the bottoms with a fork.
6. Step
Freeze for 20 minutes.
7. Step
In a medium bowl, mix blueberries, sugar, flour, cornstarch, and lemon zest.