Cut beef across grain into thin slices. Combine 1 tablespoon each cornstarch and soy sauce
with sugar, ginger and garlic; stir in beef. Let stand 15 minutes.
Meanwhile, remove florets from broccoli; if large, cut in half lengthwise. Cut stalks crosswise into 1/8-inch slices.
Combine remaining cornstarch and soy sauce with 1 cup water. Set aside.
Heat 1 tablespoon oil in wok or large skillet over high heat. Add meat and stir fry 1 minute; remove.
Heat remaining oil in same wok. Add broccoli, onion and carrot; stir fry 4 minutes, or until vegetables are tender-crisp.
Stir in meat and soy sauce mixture; bring to boil. Cook and stir until sauce thickens.