1/4 ounce package active dry yeast
1/2 cup warm water
1 1/2 cups all-purpose flour, plus 1/4 cup for kneading dough
1 large egg
3 tablespoons extra virgin olive oil
1 1/2 teaspoons salt
3 to 4 campari tomatoes, sliced
2 tablespoons unsalted butter
1/2 of a fennel bulb, sliced, reserve about 1/4 cup fennel fronds
2 cloves of garlic, mashed into paste
1/4 cup fontina cheese, grated
1 teaspoon lemon juice
zest of half a lemonfleur de sel to serve
In a small bowl stir together yeast and warm water, let stand for about 5 minutes.
Beat together egg, 1 tablespoon of oil and salt, set aside. In a medium bowl, add in 1 1/2 cups of flour and create a well in the center of the flour. Add yeast mixture into the well then add the egg mixture. Using a fork or your hands combine mixture until dough forms. Transfer dough to a floured surface and knead until stickiness is gone and feels smooth and elastic, adding flour as necessary. Add 1 tablespoon of oil into a bowl, place dough in oiled bowl and turn to coat. Cover with plastic wrap and let stand at room temperature for 1 hour.
In a large skillet over moderate heat melt butter then add in the fennel, salt and pepper to taste. Cook and stir occasionally until tender and golden, about 15-20 minutes.
Preheat oven to 375°F
On a floured surface, knead the dough and roll out to a 1/4 inch thickness. Roll the dough loosely around the rolling pin and unroll it over a 19-by 10-inch rectangle cast iron skillet. Brush dough with remaining olive oil then evenly distribute garlic paste, cheese, caramelized fennel, tomatoes, lemon zest, lemon juice and fennel fronds. Bake flatbread for 35 minutes until crust is golden brown. Sprinkle with fleur de sel and serve warm.