Prepare 1 recipe of no knead dough until step #6, that is shape the dough into a ball after it has risen from 6-24 hours.
Divide the dough in half and shape each piece into a ball. Cover and let rest while you prepare the filling.
Prepare the filling
Strain ricotta: place the ricotta in a fine mesh sieve or a colander covered with cheese cloth to drain excess water. Refrigerate for 2 hours.
Place frozen spinach cubes in a small sauce pan with a little water, cover and bring to a simmer. Cook 5 minutes.
Drain water, let cool and squeeze out as much water as possible.
Combine spinach, ricotta and Pecorino Romano cheese in a bowl. Season with salt, to taste.
Shape the scacciata
Flatten one dough ball with your finger tips, or a rolling pin if you prefer, into a circle approximately 12 inches.
Place on your pizza pan and cover with ricotta spinach filling, leaving a ½ inch border all around.
Flatten the second piece of dough into a circle large enough to cover the scacciata filling.
Roll the top and bottom edges together to seal.
Cover with a tea towel and let rest for 30 minutes, or up to one hour. Meanwhile, preheat your oven to 425 degrees F.
Use a fork to prick small holes on the dough, to let steam escape during baking, and brush lightly with olive oil.
Bake for 25-30 minutes or until golden brown both on top and underneath.
Transfer the baked scacciata to a wire rack to cool. Wait about 15 minutes before cutting and serving.
Notes
To Substitute Fresh Spinach for FrozenSubstitute 18 cups raw spinach for frozen spinach. Wilt the spinach in a large skillet with a bit of water. Let cool and squeeze out extra water before stirring in the ricotta.StorageKeep leftovers refrigerated for up to 3 days. Reheat in a 350 degrees F preheated oven before serving or enjoy at room temperature.To FreezeWrap well in plastic wrap or parchment paper and place in an airtight container or freezer bag. Freeze for up to 1 month. Defrost overnight in the refrigerator and heat in the oven before serving.