Step 1: Prepare the Dough

1. Preheat Oven: Preheat your oven to 375°F (190°C). Line a baking sheet with parchment paper.
2. Mix Dry Ingredients: In a mixing bowl, combine the all-purpose flour, baking powder, salt, and garlic powder (if using).
3. Add Cheese and Oil: Stir in the shredded mozzarella cheese and olive oil until well combined.
4. Form the Dough: Gradually add water, a tablespoon at a time, mixing until a soft dough forms. If using ricotta cheese, fold it in at this stage.

Step 2: Roll and Fill

1. Roll Out Dough: On a lightly floured surface, roll out the dough into a rectangle about 1/4 inch thick.
2. Spread Pesto: Spread the pesto evenly over the rolled-out dough, leaving a small border around the edges.
3. Roll Up: Starting from one long edge, carefully roll the dough into a tight log. Pinch the edges to seal.

Step 3: Slice and Bake

1. Slice Rolls: Cut the rolled dough into 1-inch slices and place them on the prepared baking sheet.
2. Egg Wash: If desired, beat the egg and brush it over the tops of the rolls for a golden finish. Sprinkle with Parmesan cheese if using.
3. Bake: Bake in the preheated oven for 15-20 minutes, or until the rolls are golden brown and cooked through.

Step 4: Serve

1. Cool Slightly: Allow the rolls to cool for a few minutes on a wire rack.
2. Enjoy: Serve warm as an appetizer or snack. They can be enjoyed on their own or with marinara sauce for dipping.