In a medium saucepan, combine the vinegar, cilantro,coconut aminos, and red pepper flakes over medium-high heat, stirring constantly until it comes to a boil.
As soon as the vinegar mixture comes to a boil, reduce the heat and simmer for 5 minutes. Remove from the heat and pour into a separate bowl to cool.
Once cool, add the cucumber and red onion. Marinate for 30 minutes. The cucumber and onions will be slightly softened.
Press a few pieces of the smoked salmon together to form a long strip about 7-inches-long and 3-inches-wide. Gently spread the cream cheese over top of the salmon.
At the bottom of the salmon strip, place 1 slice of avocado and about 2 tablespoons of the cucumber-onion mixture. Carefully roll the salmon strip forward, enclosing the fillings. Place on a plate and repeat with the remaining salmon. Place the salmon rolls in the refrigerator for 4 hours to set.
Chop the remaining cucumber and onion into small pieces. Cut the salmon rolls into 1-inch slices and serve with cucumber mixture to garnish.
Notes
Tips and Substitutions
Be sure the salmon is cold before pressing it into a strip.
If needed, before rolling, place the cream cheese coated salmon in the fridge to chill.If it is too warm, it will be difficult to neatly roll it up with the filling.
Make sure the cream cheese is spreadable before putting on the salmon.
Use the parchment paper to help roll the salmon sushi roll tight.
Substitute the cucumber relish for capers and shaved asparagus.
Sprinkle black and white sesame seeds or everything bagel seasoning over top.