What is fougasse? It’s basically a French version of Italian focaccia bread. The flatbread can be slashed to form shapes and topped with an herb topping.
In a large mixing bowl combine flour, salt, yeast, rosemary, olives. Stir together. Add water all at once. Mix until the mixture is no longer dry. Cover with plastic wrap and let sit at room temperature for 18 hours undisturbed. (if using active dry yeast, dissolve yeast in 1/4 cup of the water.)