Step 1

In a medium bowl, combine orange zest and juice, soy sauce, vinegar, and cornstarch; set stir-fry sauce aside.

Step 2

In a large nonstick skillet, heat 1 teaspoon oil over medium. Working in two batches, cook pork until browned on one side, 1 to 2 minutes (pork will cook more in step 4). Transfer to a plate and set aside; reserve skillet.

Step 3

Add remaining teaspoon oil, garlic, and scallion whites to skillet. Cook, stirring occasionally, until scallions wilt, 1 to 2 minutes. Add broccoli and 1/2 cup water; cover and cook until broccoli is crisp-tender and water has evaporated, 2 to 4 minutes.

Step 4

Add pork (with any juices) and stir-fry sauce to skillet. Cook, stirring, until pork is cooked through and sauce has thickened, 1 to 2 minutes. Top with scallion greens.