Activate yeast - Add your sugar and yeast to a jug or medium sized bowl and mix. Add the warm water and mix until everything is combined. Set aside in a warm spot to foam and rise for 5 minutes.
Form dough - Add the flour and salt to a large bowl and mix. Add the wet ingredients and use a clean hand to mix until the wet and dry ingredients are combined. It will look scraggly.
First rise - Cover with plastic wrap and set aside to rise for 30 minutes in a warm spot. It will double in size.
Stretch dough + second rise - Once risen, take the plastic wrap off and reserve. Use a hand dipped in water to grab one side of the dough and lift it up, then fold over the rest of the dough ball. Continue doing these another 3 times until you’ve been around the dough piece. This helps stretch the dough and develop the gluten and dough strands so you get a nice bread. You want to do this all around the dough another 2 times. So all up you’ll do 12 stretches of your dough. Cover with plastic wrap and rest for 5 minutes.
Preheat a fan-forced oven to 180C / 355F (200C / 390F for no fan). Brush two large baking trays with butter or oil and line with baking paper.
Portion and form bread + 30 minute rise - Dust your workbench with flour and transfer your dough out onto it. Use a large knife or bench scraper to cut into two even sized pieces. Form into two balls. Place each ball on it’s own lined baking tray and gently stretch out to 10cm/4-inch round discs. Spray lightly with oil or brush lightly with melted butter. Cover loosely with plastic wrap. Allow to rise for 30 minutes.
Egg Wash - While your dough is rising, make your egg wash by adding your flour and boiling water to a small mixing bowl. Mix until it forms a gluey paste. Set aside to cool completely at room temperature before adding the yogurt and egg. Mix until combined.
Bake - Gently brush your dough discs with the egg wash. You’re the tips of your fingers to indent a round shape around the edge of your dough, then indent a crisscross pattern in the center. Sprinkle with sesame seeds and nigella seeds and bake for 20 minutes turning around at the 10-minute mark. It will be a deep golden color. Serve fresh.