Combine red-pepper flakes, soy sauce and sesame oil in a medium, heat-proof bowl
In a large skillet over medium heat, combine oil, peanuts and orange rind. Heat, shaking occassionally until peanuts are golden brown (3-5 minutes). Carefully pour the oil into the red-pepper/sesame oil mixture and set aside.
In cast iron skillet, heat 1 TBS oil over medium-high heat. Add ground chicken and press it down with a wooden spoon into a thin layer. Season with salt and pepper. After the bottom is browned (about 5-7 minutes), break the chicken apart into small pieces and continue to cook.
While the chicke is cooking, cook the noodles, drain and toss with a small amount of sesame oil.
Remove orange rind from the chili oil. Off heat, add a small amount of the oil to the chicken. Add noodles to the pan and toss, adding chili oil as needed. Add orange juice and serve.