Prepare the ingredients: Whisk 3 eggs until smooth with no streaks. Wash and dry 1 leaf lettuce. Trim 2 slices of bread. Slice 1 piece of Spam and prep 1 slice of cheese and 1β2 tsp sriracha sauce.
Cook the Spam: Heat 1 tbsp oil in a non-stick pan over medium heat for 1β2 minutes. Fry 1 slice of Spam until golden and crisp on both sides, then set aside.
Cook the egg and bread: Add 2 tbsp oil on medium-low heat. Pour in the 3 whisked eggs to coat the pan. Place 2 slices of bread side by side onto the wet egg, press down, then flip each slice immediately to coat both sides in egg.
Assemble the fillings: Once the egg is set, flip the entire egg-and-bread piece over. On one slice, layer 1 slice of cheese, the cooked Spam, 1 leaf lettuce, and 1β2 tsp sriracha sauce.
Fold and finish: Fold the overhanging egg edges inward over the fillings. Fold the empty bread slice over to form a sandwich. Press lightly and heat for 30β60 seconds to melt the cheese.
Garnish and serve: Transfer to a plate and sprinkle with 1 tsp white sesame seeds. Cut diagonally and serve immediately.