Combine the sliced beef, soy sauce, and rice vinegar in a bowl to marinate. Set aside.
Heat up two pots with boiling water, one for the ramen and one for the broccoli.
Whisk the sauce ingredients together. Heat 1 teaspoon oil up in a skillet and cook the meat until browned. While the meat is browning, cook the broccoli and ramen noodles for 3 minutes in their respective pots. Strain and set aside.
Add the sauce to the beef and cook for 2-3 minutes, or until it thickens. Add in the broccoli and ramen and toss to coat. Sprinkle with sesame seeds if desired.