Which German dish is a Swabian stew of beef, potatoes, onions and spaetzle?

The Swabian stew of beef, potatoes, onions, and spaetzle is called Gaisburger Marsch.

Gaisburger Marsch is a specialty of Stuttgart, in southwestern Germany. Its traditional composition includes broth, cooked beef, potatoes, and Spätzle, the soft egg noodles associated with southern German cuisine. Fried onions are commonly added on top, giving the dish a rich finishing flavor.

The name refers to Gaisburg, historically a settlement that is now part of Stuttgart. A popular story says the dish was favored by officers or soldiers and that its name relates to a march to Gaisburg, although several versions of the origin story circulate.

The dish is sometimes described as a hearty one-pot meal, but the noodles and potatoes are usually recognizable components rather than interchangeable additions. It is distinct from general German Eintopf, a broad category of stews in which ingredients vary widely.