Hearty beef sirloin meets sweet caramelized onions and creamy mozzarella in this comforting dish. Tender noodles soak up the savory broth, while golden cheese adds a luscious finish to every bite.
For a cheese-free variation, omit mozzarella or use a dairy-free alternative.
Substitute beef broth with vegetable broth for a lighter version.
Store leftovers in an airtight container in the refrigerator for up to 3 days.