Lemon Tarragon Shrimp and Scallops is just like Spring: light and bright. Patti used fresh lemon juice and plain Greek yogurt to give it a creamy sour cream-like flavor.  It had a crunchy topping from crushed cheese crackers. Patti likes them because the crackers come in so many flavors. And with warmer weather just around the corner these only took about 10 minutes on…