Great sandwiches are often a product of careful bread-to-filling ratios. Then there’s this Capitol Hill deli, which hides behind a nondescript entrance. Vance Dingfelder piles his corned beef or pastrami so high, meat becomes a succulent, rose-hued precipice barely contained by two slices of marble rye. The excess is the point. You can order a slightly smaller “Seattle style” sandwich for a few bucks less, but that’s no fun. What is fun: the option to combine two, or even three meats, or add a schmear of chopped liver.