Place flour in a large bowl; stir in boiling water until dough forms a ball. Turn onto a floured surface; knead until smooth and elastic, 4-6 minutes. Place in a large bowl; cover and let rest for 30 minutes., Divide dough into 8 portions; roll each portion into an 8-in. circle. Brush with 1/2 teaspoon sesame oil; sprinkle with 1 heaping tablespoon of green onion and 1/8 teaspoon salt. Roll into a thin cylinder (jelly-roll style); starting at one end, twist cylinder onto itself forming a coil, pinching to seal. Flatten slightly. Roll each coil to 1/8-in. thickness., In a large skillet, heat 1 tablespoon canola oil. Over medium-high heat, cook 1 pancake at a time until golden brown, 2-3 minutes on each side., Meanwhile, in a small bowl, combine sauce ingredients. Serve with pancakes.