Step 1

Set grill or grill pan to medium. Rub the steak with the oil, garlic powder, and rosemary. Season on both sides with salt and pepper. Grill 6–7 min. per side, until desired doneness (145°F for medium).

Step 2

Meanwhile, add the mashed potatoes and spinach to a large microwave-safe dish. Cover with vented plastic and microwave 2–3 min., until hot. Season with salt and pepper to taste.

Step 3

Thinly slice steak and serve with potatoes.