Should I slice the steak before or after cooking?
Slice it thinly before cooking for faster, more even cooking and better sauce absorption. Partially freeze the steak for 15-20 minutes first for cleaner cuts.
Can I use a different cut of beef?
Yes. Flank steak, sirloin, or ribeye work well. Avoid tough cuts; stick with tender, quick-cooking steaks sliced thin.
How do I prevent the steak from becoming tough?
Don't overcook it. Sear briefly over medium-high heat until just done, then remove and set aside before finishing the sauce. Add it back at the very end to warm through.
Can I prep this ahead of time?
Yes. Slice all vegetables and steak up to 4 hours ahead. Store separately in the fridge. Cook everything fresh when ready to serve for best texture.
What if the sauce is too thin?
The cornstarch should thicken it as it simmers. If still thin after 2-3 minutes, mix 1 tbsp cornstarch with 2 tbsp water and stir in until it reaches desired consistency.