Heat oil in a medium heavy bottom sauté pan or wok.
Add the veal strips and stir-fry for 1-2 minutes.
Add the ginger, garlic and white part of the green onions only. Stir-fry for 1-2 minutes.
Add the chili sauce, black pepper, brown sugar, oyster sauce, rice vinegar, and soy sauce; bring to a simmer.
Mix the corn starch and chicken broth in a small bowl. Add to the simmering mixture. Bring to a boil for 1 minute.
Add the broccoli-cauliflower mix; gently toss together to heat through.
Garnish with onion greens. Serve immediately over steamed rice.