Beef Stroganoff

Melt butter in a skillet over medium-high heat until hot.

Add beef strips in one layer and sear quickly.

Brown edges but keep centers tender.

Transfer beef to a plate and set aside.

Add onion and mushrooms to the same pan.

Cook until softened and lightly browned.

Sprinkle flour and stir to coat evenly.

Pour in broth and stir until sauce thickens.

Stir in sour cream, mustard, and paprika.

Return beef, warm through, and serve over noodles.