By Molly Watson
Sour or "pie" cherries, including Montmorency (like those pictured here) and Morello varieties, are tart in flavor and right red in color. They are celebrated in the Great Lakes region of the Midwest - Michigan especially - where they are only available for a few short weeks. Sour cherries are common on the East Coast as well, but are scarce in the West. No matter where you find sour cherries, look for red unblemished cherries with their stems still attached.