Sprinkle salt and pepper on the chicken pieces. Then toss them in cornstarch so they get a little coating.
Heat some oil in a big pan over medium-high heat. Cook the chicken until it’s nice and golden, about 6 to 8 minutes. Take it out and set it aside.
In the same pan, add the broccoli and a splash of water. Cover the pan and let it steam for 2 or 3 minutes until it’s tender but still crisp.
Mix the orange juice, soy sauce, brown sugar, vinegar, garlic, and ginger in a bowl. Pour that into the pan and let it bubble a bit.
Stir in the cornstarch mixed with water (this will make the sauce thick and glossy). Cook for another minute or two until it looks shiny.
Put the chicken back in the pan, stir it all together so everything’s coated in sauce, and you’re done! Serve it up with some rice or noodles.