Shake all except lager with ice. Strain into Old Fashioned glass (no ice). Add lager and stir gently to incorporate. Express lemon peel, swipe rim & drop in.
Make sure to use a black lager (aka schwarzbier) for this. Stouts, porters, etc. are too heavy... Might be a touch sweet, but I was aiming for a little more mass-market appeal, since the winning drink from this contest will appear on The Chesterfield's menu... Dropping the Orgeat to 1/4 oz definitely brings the flavor more in line with the palates of most of us here.
Created for a Buffalo Trace cocktail contest at The Chesterfield in Dallas, TX, November, 2012