Peel your carrot. Thoroughly rinse the cucumber and green onions.
Thinly slice your green onion and cut off both the ends of carrot and cucumber so they are nice and flat.
Next, using a tabletop or a hand spiralizer, spiralize the cucumber and carrots into thin, curly noodles.
In a large mixing bowl, combine fresh squeezed lemon juice, garlic salt, celery salt, oil and black pepper; Whisk until really well combined.
Add drained tuna, green onion/scallions, carrots and cucumber noodles.
Using a wooden spoon, stir gently until noodles and tuna are nicely combined.
Sprinkle with sesame seeds and red pepper flakes if desired & serve immediately.
Enjoy!