Ingredients
1 pork tenderloin (about 12 ounces), halved lengthwise and thinly sliced
Kosher salt and freshly ground pepper
1/4 cup vegetable oil
2 cups cooked brown rice or rice blend
1 white onion, cut into 1-inch pieces
1 large red bell pepper, cut into 1-inch pieces
6 ounces green beans, trimmed and halved
1/2 small pineapple, cored and cut into 3/4-inch pieces (2 cups)
1 tablespoon Sriracha or chili-garlic sauce
2 tablespoons cornstarch
1/2 cup packed chopped fresh cilantro, plus more for serving
Preparation
Season pork with salt and pepper. Heat 1 tablespoon oil in a large cast-iron or nonstick skillet over high. Add rice and reheat, covered, shaking skillet a few times, 2 minutes. Transfer to a bowl, stir in cilantro, and cover to keep warm.
Return skillet to high heat; swirl in 1 tablespoon oil. Add pork and cook, stirring a few times, until browned in places and almost cooked through, 2 minutes; transfer to a plate.
Add remaining 2 tablespoons oil, onion, bell pepper, green beans, and pineapple to now-empty skillet and season with salt and pepper. Cook, stirring frequently, until vegetables are crisp-tender, 8 to 10 minutes.
Whisk together Sriracha sauce, cornstarch, and 1 cup water in a small bowl; add mixture to skillet along with pork and any accumulated juices. Cook, stirring, until sauce thickens, about 30 seconds. Divide rice over four plates; spoon stir-fry on top and garnish with more cilantro before serving.