To Make the Citrus Soy Sauce (Optional):
In a small bowl, stir together the soy sauce, lemon juice, water, mirin, and sliced green onion. Keep the sauce chilled in the refrigerator while preparing the salmon roll ups.
To Make the Salmon Roll Ups:
Prepare the Cream Cheese Filling: In a small bowl, mix together the whipped cream cheese, green onion, and lemon zest. Set aside.
Prepare the Outside of the Roll: Lay a large piece of plastic wrap on the counter and sprinkle it with Everything But The Bagel Seasoning. Then lay the smoked salmon slices over the seasoning to form a small rectangle, slightly overlapping the slices.
Add the Filling: Spread the cream cheese mixture evenly over the salmon. Place the sliced cucumber and avocado strips in the center of the rectangle.
Roll Up the Salmon: Carefully use the plastic wrap to help roll the salmon over the cucumber and avocado, continuing to roll until you reach the other side.
Freeze & Slice: Place the salmon roll in the freezer for 5-10 minutes to firm up slightly. This will make it easier to cut. When ready to serve, remove the roll from the freezer and slice it to your preferred thickness.
Serve: Serve the salmon roll ups with the citrus soy sauce, or make thinner slices and enjoy them with your favorite crackers.