Make the sauce. In a bowl add the soy sauce, sriracha, sweet chilli sauce, garlic paste, ginger paste, and 40ml of water. Mix it well and set aside.
Cut the chicken into bite sized pieces. Heat some oil in a large frying pan over a medium to high heat. Cook the chicken until there are no more pink bits.
Add in the red onion, broccoli, and mushrooms and stir fry for about 5 minutes until it softens.
Meanwhile, cook the noodles as per the packet instructions. Once cooked, drain them, and add them into the pan and toss together.
Pour over the sauce and warm it through, then dish it up and enjoy.