Preheat the oven to 180 C/ 350 F.
First, combine the flour, instant yeast, sugar and salt in a bowl. Then pour olive oil and warm water. Combine the mix well until you reach a soft and smooth dough.
Cover the bowl with moisturized kitchen towel and set a side for an hour. Its size will be double.
While your dough is resting, prepare your filling. Heat olive oil in a wide pan and stir in the onions and peppers.
Saute the onions and peppers for 3 minutes at medium heat, until they start to get soften. Stir in the tomatoes and continue for an additional 2 minutes. Add the salt and ground black pepper. Turn the heat off.
Place the ground beef in a bowl and combine the cooked ingredients with the ground beef and them mix well. This is your topping for Pide.
Once the dough rise, place the dough on a floured surfaced counter. Cut the dough into 18-20 equal size balls.
On a lightly floured surface, roll the dough balls into oval shapes of 25 cm x 50 cm with ½ cm thickness.
Place baking paper in an oven tray and place oval shaped thin dough on it. (You can try to place 2 oval shape dough to 1 baking tray)
Spread the filling evenly over the 2 oval shaped dough by leaving 1 cm at the edges as a border with no filling.
Fold/Seal the sides of the dough to keep the filling in it. Repeat the same steps until you finish all dough balls.
Beat an egg in a small cup and mix it with 1 tbsp. olive oil. Brush the edges/corners of dough with this mixture.
Bake for 20 minutes, until the all Pides are golden brown color and crispy at the edges.
Cut into slices and then serve.