In a large mixing bowl, combine the flour, salt, and instant yeast. Then add the olive oil and water. Stir to combine, then knead with your hands (or use a kitchen machine with a dough hook) until it's a smooth dough. If the dough is too sticky, add more flour; if it's too crumbly, add more water.
Cover the bowl with a clean kitchen towel and let it sit in a warm place until the dough doubles in size (for about 2 hours).
Divide the dough into 5 equal pieces. Roll out each piece on a lightly floured parchment paper, like you would with small pizzas or naan.
Bring a (flat) pan to high heat, add a drizzle of olive oil, then add the flatbread. Let it cook for 1-2 minutes until the top side is bubbly, then flip and let it cook for another minute.
Sprinkle the flatbreads with salt and fresh parsley. Serve them with hummus, for example!