Prepare the Filling:

1. Preheat the Oven: Preheat your oven to 375°F (190°C). Line a baking sheet with parchment paper or a silicone baking mat to prevent sticking.
2. Make the Filling: In a mixing bowl, combine the crumbled feta cheese, ricotta cheese, olive oil, oregano, garlic powder, salt, and black pepper. Stir until the ingredients are fully incorporated, and the mixture is creamy.

Assemble the Phyllo Bites:

3. Prepare the Phyllo Dough: Unroll the phyllo dough carefully on a clean, flat surface. Phyllo dough is delicate, so handle it gently to avoid tearing. Brush a sheet of phyllo dough with olive oil, then layer another sheet on top and brush that with oil as well. Repeat this process for 3-4 sheets of phyllo dough to make a sturdy base for your bites.
4. Cut the Dough: Using a sharp knife or kitchen scissors, cut the stacked phyllo sheets into squares, about 3-4 inches in size.
5. Add the Filling: Place about 1-2 teaspoons of the feta mixture in the center of each square of dough. Be sure not to overfill, as the dough needs to fold easily around the filling.
6. Fold the Phyllo: Fold the corners of the phyllo square up toward the center, creating a little packet. Gently press the edges together to seal the filling inside. If needed, you can lightly press the dough to make sure it stays closed.

Bake the Bites:

7. Egg Wash: In a small bowl, whisk the egg and brush it over the tops of the phyllo packets. This will help them turn golden brown and crispy as they bake.
8. Bake: Arrange the filled and folded phyllo bites on the prepared baking sheet. Bake for 15-20 minutes or until the phyllo is golden and crispy, and the filling is warm.
9. Cool and Serve: Once baked, remove the phyllo bites from the oven and allow them to cool for a few minutes. Garnish with fresh parsley for a burst of color and flavor, if desired.