Blackberry Spinach and Feta Salad with Balsamic Vinaigrette

Blackberries, blueberries and cherries are ready to pick here in Michigan. We have 10 pounds of blueberries already in our freezer. We prefer the blackberries fresh so when we received two pints in our CSA share we were excited. I let the kids eat one pint right away and saved the other for our dinner…