Low Carb Sushi Rolls with Smoked Salmon and Avocado

small package smoked salmon (sliced into thin strips)

small English cucumbers (cut into matchsticks)

green onions cut into long strips

avocado (thinly sliced)

full nori seaweed sheets

sesame oil

For the sauce: soy sauce or gluten free tamari (for gluten free with wasabi (optional))