Place broccoli in a bowl covered with plastic wrap. Poke holes in plastic. Microwave 1-2 minutes.

Make marinade. In a small bowl whisk together the marinade ingredients; soy sauce, sesame oil, baking soda, and cornstarch. Add the sliced beef and mix coating the meat. Marinate for at least 20 minutes or overnight.

Make sauce. In a small bowl whisk together the sauce ingredients; beef stock, oyster sauce, soy sauce, rice wine, ground ginger and cornstarch.

In a wok or large skillet add 2 Tbsp oil and heat on high until oil starts to smoke. Add onions and stir fry 1-2 minutes. Add tomatoes and stir 1-2 minutes. Add broccoli and stir fry 1-2 minutes. Transfer to plate.

Add more oil if needed but beef will give off liquid. Add garlic and marinated beef. Stir fry to just sear the beef.

Mix in sauce, add vegetables and cook for 1-2 minutes to thicken sauce.