Make the red curry sauce. In a large jar, add coconut milk, coconut aminos, curry paste, tomato paste, garlic, ginger, curry powder, cayenne pepper, and some salt and pepper. Using an immersion blender, blend to combine. You can also use a whisk or a small blender. Set aside.
Cook noodles. Bring a large pot of water to a boil and cook rice noodles according to the package instructions until just al dente. You don't want to overcook them as they will go back in the pan later on. Once done, drain and rinse under cold water.
While the water comes to a boil, cook the chicken. Heat a large skillet over medium heat. Add oil and let it get hot, about 30 seconds. Saute for 5-7 minutes, stirring occasionally, until just cooked. Remove from the pan, leaving the juices behind, and set aside. It will go back in the pan, but you don’t want to overcook it later on. Sauté the veggies. Leaving the chicken juices in the pan, add onions and some salt and pepper and sauté for 2-3 minutes until slightly softened. Then add broccoli and stir to combine. Cover with a lid and sauté for 3 minutes. Next add peppers and stir to combine. Cover with the lid and sauté for another 3 minutes. Finally add mushrooms with some salt and pepper and saute for another 2-3 minutes.
Drain and rinse noodles under cold water.
Bring it all together. Turn down the heat to low and add noodles, chicken, and curry sauce into the pan with the veggies and toss to combine. Let simmer for 2-3 minutes for the flavors to combine and the sauce to thicken a little. Add lime juice and stir to combine.
Enjoy! Top with optional toppings and enjoy!