How do I know when the steak bites are cooked through?
Use a meat thermometer: 125–130°F for medium-rare, 135–145°F for medium. Alternatively, cut into the largest piece; juices should run slightly pink for medium-rare. Cook 3–4 minutes per side over medium-high heat.
Can I make the chimichurri sauce ahead?
Yes. Chimichurri keeps refrigerated for up to 5 days in an airtight container. Prepare it a few hours or even a day before serving; flavors deepen as it sits.
What cut of steak works if I don't have ribeye?
New York strip, filet mignon, or sirloin work well. Avoid very lean cuts; marbling ensures tenderness and flavor when seared into 1-inch cubes.
Can I prepare the mashed potatoes in advance?
Yes. Mash potatoes up to 4 hours ahead, then reheat gently in a saucepan over low heat with a splash of cream or butter, stirring frequently to avoid sticking.
How much of this recipe serves one person?
This recipe yields approximately 4 servings. For one person, divide all ingredient quantities by 4 and reduce cooking time slightly for the steak bites.