Combine flour, maple syrup and boiling water in a large bowl and stir until a mass of dough forms.
Transfer the dough to a lightly floured surface and knead until smooth, slightly tacky ball forms.
Transfer dough ball to a medium bowl and cover with a kitchen towel or cling film. Leave to rest for 30 minutes at room temperature or up to overnight in the fridge.
Meanwhile, mix vegetable oil and sesame oil together in a small bowl.
Separate dough into four equally sized balls.
Roll one ball at a time into an 8-inch disk and brush with a thin layer of the oil mixture, then sprinkle ¼ of the sliced spring onions.
Roll tightly, then twist into a tight spiral, tucking the outer end underneath the roll.
Using the palm of your hand, flatten the spiral, then roll out again into an 8-inch disk.
Brush the top with another thin layer of oil mixture.
Repeat with remaining dough balls.
Pour some vegetable oil into an 8-inch pan over medium-high heat and gently add the first pancake.
Cook until golden on one side.
Flip and cook until golden on the other side, about 2–3 minutes per side.
Remove to paper-towel lined plate and season immediately with salt.
Repeat with the remaining pancakes, adding more oil if necessary.
Cut pancakes into triangles and serve with dipping sauce and a sprinkle of sesame seeds.