1. In a mixing bowl, combine flour, salt, sugar, and yeast.
2. Add warm water and olive oil, mix until a dough forms.
3. Knead the dough for about 10 minutes until smooth and elastic.
4. Place the dough in a lightly oiled bowl, cover, and let rise for 1 hour.
5. Preheat oven to 450°F (230°C).
6. Punch down the dough and divide it into two equal parts.
7. Roll each part into a 10-inch oval shape.
8. Mix all the cheeses together and divide the mixture between the two dough ovals, leaving a border around the edges.
9. Fold the edges of the dough over the cheese to form a boat shape.
10. Brush the edges with egg wash.
11. Bake for 15-20 minutes until golden brown and the cheese is bubbly.