Preheat oven to 400 degrees.
In a small bowl, mix the softened butter, Greek yogurt, and salt. Refrigerate until ready to serve.
Toss the cut potatoes with 1 tablespoon oil, ½ teaspoon salt, and ¼ teaspoon pepper.
Spread the potatoes evenly on a baking sheet and roast in a preheated oven until lightly golden and softened. Set aside.
Dissolve the yeast in a small bowl. Stir in 2 tablespoons sugar and allow the mixture to get foamy (approximately 5 minutes).
Place the flour in a bowl of a stand mixer along with 1 teaspoon salt.
Stir in the foamy yeast into the flour mixture and mix with the dough hook until the dough forms a shaggy ball.
Turn the dough out onto a lightly floured surface and hand-knead the dough for 2-3 minutes.
Return the dough to the bowl of the stand mixer, cover with plastic wrap. Allow the dough to rise in a warm, draft-free place until doubled (approximately 60 minutes).
Once doubled, divide the dough into two equal pieces.
Roll each half of dough out onto a lightly floured surface (keeping the other covered to not dry out) to form an approximate 13″ circle (roughly ¼” thick).
Drizzle and evenly spread the dough circles evenly with 1 teaspoon sesame seed oil, half the roasted potatoes, half the green onions, half the bacon, half the shredded cheese, and a sprinkling of black pepper. [mv_img id="38279"]
Gently but tightly roll the dough into a jelly roll or long snake form. [mv_img id="38280"]
Once fully rolled, carefully and gently stretch the dough to elongate and even out the thickness (if needed).
Starting at one end of the roll, coil the dough for form a large spiral. [mv_img id="38282"]
Gently flatten the spiral with your hand to form an approximate 10″ disc.
Continue the same process with the other half of the dough and the remaining ingredients.
Add 1 tablespoon of grapeseed oil to a large cast-iron skillet and cook the bing bread over medium/high heat until golden brown on both sides.
Meanwhile, in a small bowl, whisk together the soy sauce and ½ tablespoon sugar.
Brush one side of the browned bing bread with a liberal amount of the soy sauce mixture and sprinkle with 1 tablespoon sesame seeds. [mv_img id="38288"]
Place the skillet into a preheated oven and bake for approximately 13-15 minutes until cooked through.
Remove and repeat the same process with the second coiled disc.
Bing bread is best served warm, cut into wedges, along with the yogurt butter.