In a small bowl, combine the ricotta, Italian seasoning and salt. Stir in the mozzarella cheese, pepperoni, Parmesan cheese, mushrooms, green pepper and onion. Separate crescent dough into four rectangles; seal perforations.
Spread cheese mixture over each rectangle to within 1/4 in. of edges. Roll up jelly-roll style, starting with a short side; pinch seams to seal. Cut each into four slices.
Place cut side down on greased baking sheets. Bake at 375° for 10-15 minutes or until golden brown. Serve warm with pizza sauce. Refrigerate leftovers.