After thawing out the frozen spinach, squeeze it well to get rid of excess water before mixing with the ricotta cheese for the filling. Simply season the filling with salt and pepper. Minced garlic may also be added if desired.
Using a rolling pin, roll out the dough into a rectangle about 1/4" thick. Spread the filling evenly and roll it up carefully so the filling stays inside. Cut into pieces then place on baking sheets. Bake at 350F for about 20 minutes or until tops are lightly toasted. Serve with a salad or soup for a light lunch or dinner idea.