Pan fry Dulse in refined sesame oil over medium heat, pressing down with a spatula and flipping frequently for about one minute. The dulse will become crisp, turn yellow/green, and smell like bacon.
Remove from pan and pat oil off with paper towel. Color will return to deep red when the dulse cools.
Spread mayo on toasted bread, add lettuce, crispy dulse, and tomato. A DLT!