In a large bowl, mix well ingredients from tuna to hot sauce, if using, to make tuna salad.
Make avocado slices. Cut the cucumbers and the carrot into match stick shape or use a julienne peeler like I did.
Cut the square nori sheets in half so it turns into two rectangular sheets.
Take a piece of nori sheet and place it shining side down. Overlap 2 butterhead lettuce leaves at a 45 degree angle to the top left corner of the nori sheet
Add about a tablespoon of tuna salad over the lettuce and spread it evenly.
Layer 2 avocado slices, carrots, and cucumber. Try not to overload it with too much food.
Roll the bottom left corner up to the middle of the top edge of the nori to form a triangle. Continue rolling until you form a cone shape.
Dap the tip end with a few taps of water to help secure the folds.
Enjoy them right away so the nori sheets will remain crunchy.