Wanted to get the word out on The Schlitz, a classic German bar & restaurant in the deep South Bronx, corner of 137th Street & Willow Avenue. (#6 Train to Cypress Ave.) Great eats (the wurst and boiled beef with horseradish are fantastic) prepared by the surly proprietor and delivered by her amicable son & bartender. Bargain is an understatement. Meal isn't complete without a tall pitcher of Schlitz, the joint's only tap beer. Alert: open only until 7 p.m. mon-fri. lunch is the name of the game.