Measure the water and shiitake into a large open casserole dish that you intend to cook your tteokbokki in. Set aside for 30 minutes to allow the dried shiitake to soften and infuse the water.
If you are soaking your tteok (rice cakes), add them to a large bowl of room temperature water and set aside.
After the soaking time, scoop the shiitake out of the broth and give them a good squeeze to release extra flavour into the broth. You can discard them but I prefer to chop them finely and return them to the broth.
Add the spring onion greens and optional perilla leaves to the shiitake broth and turn the heat to medium. Allow to come to a simmer before adding the gochujang, gluten free soy sauce, fish sauce and maple syrup.
Stir to combine and create a bright red broth, then add the tteok (rice cakes).
Cook the tteokbokki over a medium heat, stirring intermittently, until the sauce starts to bubble and thicken. Once it has, taste the sauce and adjust according to your preferences. Add the seasoning, gochugaru and anything else you think the dish needs.
Allow the sauce to thicken to your desired preference – whether that be a thick, paste like sauce or more of a soupy consistency.
Top your tteokbokki with toasted sesame seeds, a good drizzle of toasted sesame oil and some optional spring onion greens. Serve immediately for best results because the tteok harden as they cool.
To reheat, add a splash of water and heat on the stove or in the microwave. Leftovers keep well in the fridge in an airtight container for a number of days.