Bring a large pot of water to the boil. Add the sweet potato glass noodles and cook for 6–8 minutes or until softened.
Drain the noodles well, leaving a small amount of cooking water in the pot.
Add the soy sauce, minced garlic, vegetable oil and brown sugar. Stir-fry over medium heat until the sauce has reduced and is absorbed into the noodles.
In a separate pan, stir-fry the onion, pepper and carrot with a pinch of salt until just tender.
Add the stir-fried vegetables and baby spinach to the noodles and toss everything together until well combined.
Finish with sesame oil and sesame seeds. Serve warm.