1. Cut the bagel lengthwise. 2. Toast the bagel until lightly golden. 3. Heat butter in a small skillet over medium heat. 4. Place a slice of cheese on one half of the bagel. 5. Add a slice of ham, if using. 6. Fry the egg to your preference (usually slightly runny yolk). 7. Place cheese on the egg during the last 30 seconds so it melts. 8. Put the egg with melted cheese on the bagel half with cheese (and ham). 9. Season with salt and pepper and close the sandwich. Optional additions: bacon, tomato slice, spinach leaves.

   Use a baking tray with rims to avoid dripping in the oven. 1. Mix flour, water, oil and the salt in a bowl. 2. Knead the dough thoroughly on a floured work surface. Form a ball and cover with a plastic wrap. Set aside. 3. Add salt, pepper and thyme into cup with yogurt and stir a little. 4. Cut the onion into two pieces. Cut each piece into fine halfrings. 5. Cut bacon slices into small squares. 6. Line the bottom of a baking tray with rims with parchment paper. 7. Remove the plastic wrap from the dough. Roll out the dough on a floured surface into a thin sheet about the size of a baking sheet. 8. Transfer the dough onto a baking sheet. 9. Put yogurt on the dough and spread over the entire surface of the dough, leaving only 1 cm free from the edge. 10. Put a layer of bacon slices on top; a layer of onion on top of the bacon; a layer of cheese on top of the onion. 11. Preheat the oven to 410F (gas oven). 12. Bake the pie on the middle rack of the oven for about 15 min. The unsealed edges of the pie should be slightly golden brown.