Prep Time 15 minutes mins
Cook Time 25 minutes mins
Resting Time 5 minutes mins
Total Time 45 minutes mins
For best texture, slice Brussels sprouts and onions thin so they soften quickly without steaming; a mandoline helps. Patting the steak very dry prevents steaming and encourages browning, and slicing against the grain keeps it tender. If using a different cut like skirt or sirloin, adjust sear time down to avoid overcooking. Par-cooking diced potatoes in the microwave for 2 minutes can speed things up on busy nights. Keep the skillet hot but not smoking to avoid burning fond; if it gets too dry, splash in a tablespoon of water to release browned bits. Finish with a squeeze of lemon to brighten the richness, and add a fried egg on top to turn it into a hearty brunch.