Preheat oven to 400 degrees Fahrenheit (200 degrees Celsius). Prepare a Gefen Parchment Paper lined baking sheet and set aside.

Process the potatoes in your food processor. Transfer to a mixing bowl. Add the eggs, potato starch, salt, and pepper and mix well.

Heat the oil in a small saucepan. When oil is heated through, add to the potato mixture (it should sizzle) and stir well. Transfer potato mixture to the baking sheet and smooth it down evenly so you have a thin layer. Bake for 40–50 minutes or until golden brown and crispy. Set aside.

Preheat oven to 325 degrees Fahrenheit (170 degrees Celsius).

Rinse brisket and pat dry.

Slice the onion and arrange on the bottom of a roasting pan. Lay the brisket on top of the onions.

Season well with salt and pepper. Smear the garlic cloves over the meat. Pour chicken broth around the roast.

Combine barbecue-sauce ingredients and pour over the brisket.

Cover well and bake for four hours or until fork-tender. Use two forks to pull apart the brisket.

Preheat oven to 350 degrees Fahrenheit (180 degrees Celsius).

Slice off the top of the garlic bulb, exposing the tips of the cloves. Place the garlic bulb in the center of a piece of foil. Drizzle with oil. Seal the foil well and roast the garlic in the oven for 30–35 minutes. Remove from oven and cool.

Pop out the cooled garlic cloves (by pressing from the bottom) into a small bowl. Add the remaining aioli ingredients. Mix together with an immersion blender.

Turn the potato flatbread out of the baking sheet and onto a piece of Gefen Parchment Paper. Peel the parchment paper off the bottom. Flip back into the baking sheet right side up.

Using a sharp knife, slice the potato flatbread in half lengthwise, then slice into six pieces widthwise. Smear the entire potato flatbread with the roasted garlic aioli. Top with the pulled brisket. Serve one flatbread per person.

Pour remaining brisket liquid into a small saucepan. Add one to two teaspoons potato starch when cold. Slowly bring to a boil and simmer until thickened. Drizzle over each flatbread before serving.