Start by cooking the rice noodles according to package instructions. Drain and set aside.
In a large skillet or wok, heat the vegetable oil over medium-high heat. Add the minced garlic and grated ginger, sautéing for about 1 minute until fragrant.
Increase the heat and add the sliced beef to the skillet in a single layer. Cook for about 3-4 minutes, or until the beef is browned and cooked through.
In a small bowl, whisk together soy sauce, brown sugar, rice vinegar, and sesame oil. Pour this sauce over the cooked beef in the skillet, stirring to combine. Allow it to simmer for about 2-3 minutes until the sauce thickens slightly.
Add the sliced bell pepper and snap peas to the skillet, stirring well to coat the vegetables in the sauce. Cook for an additional 2-3 minutes, until the vegetables are tender but still crisp.
Toss in the cooked rice noodles into the skillet, mixing everything together gently until the noodles are heated through and well coated in the sticky sauce.
Serve the beef noodle bowls in individual bowls, garnished with sliced green onions, sesame seeds, and fresh cilantro.
Notes
Feel free to customize the vegetables based on your preference.