Step 1: Preheat your oven to 375°F (190°C). Line a large baking sheet with parchment paper.
Step 2: In a medium bowl, combine the softened cream cheese, crumbled feta cheese, shredded mozzarella cheese, harissa paste, chopped fresh parsley, minced garlic (if using), salt, and black pepper. Mix until all ingredients are well combined and the filling is smooth.
Step 3: Carefully unroll the thawed phyllo dough. Lay one sheet of phyllo dough on a clean, dry work surface. Lightly brush the entire surface with melted butter.
Step 4: Place a second sheet of phyllo dough directly on top of the first and brush it with melted butter. Repeat this process until you have 3-4 layers of phyllo dough brushed with butter. Keep the remaining phyllo sheets covered with a damp cloth to prevent them from drying out.
Step 5: Using a sharp knife or pizza cutter, cut the layered phyllo sheets into 8-10 equal squares or rectangles, approximately 2x2 inches to 2x3 inches, depending on your desired bite size for the Creamy Harissa & Cheese Phyllo Bites.
Step 6: Place about 1-2 teaspoons of the harissa-cheese filling onto the center of each phyllo square.
Step 7: Fold the corners of the phyllo over the filling to create a small parcel or triangle, ensuring the filling is completely enclosed. You can also roll them into a cigar shape if preferred. Lightly brush the tops of the assembled Creamy Harissa & Cheese Phyllo Bites with more melted butter.
Step 8: Carefully transfer the assembled phyllo bites to the prepared baking sheet. If desired, sprinkle the tops with sesame seeds or nigella seeds for extra flavor and visual appeal.
Step 9: Bake for 20-25 minutes, or until the Creamy Harissa & Cheese Phyllo Bites are golden brown and crispy, and the cheese filling is bubbly. Keep an eye on them to prevent over-browning.
Step 10: Remove from the oven and let cool for a few minutes on the baking sheet before serving. This allows the filling to set slightly. Serve warm and enjoy your homemade Creamy Harissa & Cheese Phyllo Bites!