Start by cooking the rice noodles according to package instructions. Drain and set aside. You want them slightly undercooked since they’ll finish cooking in the stir fry.
In a bowl, combine the NY strip steak slices with 2 tablespoons of coconut aminos, 1 tablespoon of tapioca flour or cornstarch, and a pinch of sea salt and black pepper. Let it marinate while you prep the veggies.
Slice the yellow onion, chop the red bell pepper and broccoli, and slice the green onions, keeping the green and white parts separate.
In a large skillet or wok, heat 2 tablespoons of avocado oil over medium-high heat. Once hot, add the marinated beef in a single layer and sear for 2-3 minutes until browned. Remove the beef and set aside.
In the same skillet, add the minced garlic and grated ginger. Sauté for about 30 seconds until fragrant, stirring constantly to avoid burning.
Add the sliced onion, chopped bell pepper, and broccoli to the skillet. Stir-fry for about 3-4 minutes until the vegetables are tender-crisp.
Return the beef to the skillet with the vegetables. Add the cooked rice noodles, remaining coconut aminos, chicken broth, toasted sesame oil, rice vinegar or lime juice, and sriracha (if using). Toss everything together to combine and heat through.
Season with additional salt and pepper to taste. Toss in the chopped green onions (white parts) right before serving for a burst of freshness.
Serve your 30-Minute Stir Fry Beef and Noodles hot, garnished with the remaining green onion tops. Enjoy this beautiful, colorful dish with your family or friends!