Prepare the chicken by slicing it thinly and cooking it in a skillet with vegetable oil for 5-7 minutes until browned.
Cook the rice noodles according to package instructions, then drain and set aside.
Make the spicy gochujang sauce by combining gochujang, soy sauce, honey, and sesame oil in a bowl.
Add red bell pepper, snap peas, and garlic to the skillet with chicken and stir-fry for 3-4 minutes.
Pour the gochujang sauce over the chicken and vegetables, then add the cooked noodles and toss everything together for 2-3 minutes.
Garnish with chopped green onions and sesame seeds before serving hot.