1 ½poundssweet potatoes, peeled and cut into ½- to ¾-inch cubes
2tablespoonsolive oil
¼cupsesame seeds, toasted
1 ½poundstop sirloin or flank steak, thinly sliced across the grain
3tablespoonsvegetable oil
1 ½cupsred onion, thinly sliced
1poundslender asparagus, ends trimmed, cut into 1 ½-inch pieces
1tablespoongarlic, minced (3-4 cloves)
⅔cupwater
¼cuphoisin sauce
1tablespoonsesame oil
Salt and pepper
Instructions
Preheat oven to 400°F. Spread sweet potato cubes in a single layer on a rimmed baking pan. Drizzle with 2 tablespoons olive oil. Season with salt and pepper. Bake for 20 minutes, or until just fork tender. Sweet potatoes will finish cooking in the stir fry.
Spread sesame seeds on a large plate. Season sliced steak with salt and pepper. Coat with sesame seeds. Set aside.
Heat vegetable oil in a large, heavy skillet over medium-high heat. Add the onion and fry for 1 minute. Add asparagus and stir fry until crisp tender, about 2 minutes.
Next, add beef and garlic; stir fry until meat has browned, about 3 minutes. Reduce heat to medium. Add sweet potatoes, water, and hoisin sauce to the skillet.
Cook until sauce is bubbling and coats steak and vegetables, stirring frequently, about 3 minutes. Remove skillet from heat. Stir in sesame oil. Season with salt and pepper, to taste. Serve hot over steamed rice, if desired.