Cook the rice noodles according to package instructions. Drain and rinse with cold water to prevent sticking. Set aside.
In a large skillet or wok, heat 1 tablespoon of olive oil over medium-high heat. Add the sliced chicken and cook until golden brown and no longer pink, about 5-7 minutes. Remove chicken and set aside.
In the same skillet, add the remaining olive oil. Sauté the minced garlic until fragrant, about 30 seconds.
Toss in the sliced red bell pepper and broccoli florets. Stir-fry for 3-4 minutes until they begin to soften.
Push the veggies to the side of the skillet and pour in the beaten eggs. Scramble until fully cooked, then mix with the vegetables.
Add the cooked chicken back to the skillet along with the rice noodles, bean sprouts, chopped green onions, soy sauce, fish sauce (if using), lime juice, and brown sugar. Toss everything together gently for 2-3 minutes to heat through.
Remove from heat. Serve immediately, garnished with chopped peanuts (if using), fresh cilantro, and lime wedges on the side.
Notes
Feel free to adjust the vegetables based on your preference.