To prepare the salad dressing, grate the ginger and garlic. Put it in a big salad bowl along with the chili flakes, zest of lime, lime juice, soya sauce, ½ teaspoon sesame seeds and oil. Whisk to combine it and keep the bowl aside.
In a separate bowl, put the diced salmon and pour 2 tablespoons of the salad dressing. Give it a mix and allow it to rest for about 30 minutes.
After 30 minutes, place a big pot of water on high heat. Once the water comes to a boil, drop the soba noodles, give it a stir and allow it to cook for 2 minutes.
After 2 minutes, drain the noodles using a colander and run cold water on it to stop them for cooking any further. Drop the soba noodles into the big bowl with salad dressing. Give it a toss.
Next, place a medium size non stick pan on medium high heat. Once the pan is hot, drop the marinated salmon and spread it out in one layer. Cook for few 30 seconds, and flip the salmon bites. Drop the spinach, give a stir, and cook for 1 minute.
Take it off the pan and drop it the big mixing bowl where soba noodle was kept along with the dressing. Toss everything together and place it on a serving dish.
Sprinkle the remaining ½ teaspoon sesame seed on top and it’s ready to eat.