Make the sauce and marinate the beef

• Whisk the soy sauce, brown sugar, sesame oil, rice vinegar and garlic together in a bowl.
• Pour most of the sauce over the sliced beef and marinate.
• Reserve the remaining sauce to the side for later.

Prep the vegetables and boil the water

• Slice the onion and bell pepper, cut the broccoli into florets and julienne the carrot.
• Bring a pot of water to a boil for the noodles.

Sear the beef

• Heat the oil in a pan and add the onions.
• Add the marinated beef and cook until done.
• Remove the beef from the pan and set it aside.

Saute the vegetables

• Add the vegetables to the pan.
• Saute, stirring, until tender-crisp.

Cook the noodles

• Cook the ramen noodles in the boiling water.
• Drain them before they cook all the way through so they stay firm.

Combine and finish

• Return the beef to the pan and add the garlic.
• Add the drained noodles and the reserved sauce.
• Toss everything together and serve.