In a large bowl, combine the beef steak tips with soy sauce, cornstarch, and sugar.
Let it marinate for 10 minutes.
Cook the Beef:
Heat olive oil in a large frying pan or wok over medium-high heat.
Add the marinated beef and brown it until cooked through, about 5-6 minutes.
Add Onion and Broccoli:
Stir in the thinly sliced onion and cook until tender but still crisp, about 3-4 minutes.
Then add the broccoli florets and continue cooking for another 3-4 minutes until the broccoli is tender-crisp.
Incorporate Reserved Marinade:
Pour in the reserved marinade mixture and stir well to combine.
Cook for an additional 2-3 minutes until the sauce thickens slightly and coats the beef and broccoli.
Serve:
Serve the beef and broccoli stir-fry hot over cooked rice.
Notes / Tips / Wine Advice:
Wine Pairing:
For this flavorful dish, consider pairing it with a medium-bodied red wine such as a Merlot or a Cabernet Sauvignon. These wines complement the richness of the beef and the savory flavors of the soy sauce marinade.