The lake shapes what ends up on the plate. Felchen (whitefish) and Hecht (pike) are the local catches, and any restaurant worth visiting will have them. Baden-Württemberg cooking also shows up: Spätzle, Maultaschen, and the region's excellent Pinot Noir and Müller-Thurgau wines from the surrounding vineyards.
The Niederburg quarter near the Rhine outflow is the density centre — a short stretch packed with small restaurants at every price point. The student population keeps things affordable and competitive, so you can eat well without planning much in advance.