Shrimp and grapes may sound odd, but this shrimp salad sandwich is a winner. Champagne grapes are a must, there is no substitution for their burst in your mouth sweetness. This recipe came from an elderly gentleman I stood next to at the seafood counter in the grocery store. He insisted that since I was buying shrimp I had to get some champagne grapes and make this! It started out as just a simple trio of shrimp, mayo, and champagne grapes, but over the years I've added the rolls, lemon juice and chives. This works great as an appetizer if you just make the salad, then offer some toasted bruschetta (drizzled with olive oil and lemon juice) along with it! You don't have to measure the amounts, really. I always just grab a bunch of champagne grapes, a pound or two of shrimp, and add everything else to taste. You can make this a little ahead, but I don't recommend keeping it in the fridge for more than a day. And certainly toast the rolls or bruschetta at the last minute, since it's best when the bread is warm.