This is inspired by a Bobby Flay cocktail recipe; it combines my undying love for anything strawberry-rhubarb with my love for cocktails. To my delight, I had found rhubarb bitters at Binny's and determined that I must devote myself to finding a use for it-- so here is one... I hope to find more. For the Rhubarb Syrup : 1 lb rhubarb, sliced 1 cup strawberries, halved 1 cup sugar 1 cup water Bring all the ingredients to a boil and simmer for 3 minutes. Cover and let steep for 1 hour. Strain the mixture through a sieve, pressing against solids and let it cool completely. For the Cocktail : 1 cup white tequila 1/4 cup fresh lime juice 2 T freshly squeezed orange juice 2 T Cointreau 3/4 to 1 cup rhubarb syrup (start with less and see if you want it sweeter) egg whites (one per shaker full) rhubarb bitters Combine tequila, lime juice, orange juice, Cointreau and rhubarb syrup in a small pitcher. Fill a large cocktail shaker with ice and pour in the cocktail base (