01 - Preheat the oven to 400°F. Line a large baking sheet with parchment paper.
02 - In a large skillet over medium heat, wilt the spinach for 2–3 minutes. Drain any excess liquid and let cool.
03 - In a bowl, combine the cooled spinach, feta, cream cheese, garlic, dill, parsley, black pepper, nutmeg, and lemon zest. Mix until well combined.
04 - Place one sheet of phyllo pastry on a clean surface; keep remaining sheets covered with a damp towel to prevent drying. Lightly brush the sheet with melted butter.
05 - Cut the sheet lengthwise into 2 equal strips. Place 1 heaped tablespoon of filling at the bottom of each strip. Fold the corner over the filling to form a triangle; continue folding up the strip, maintaining the triangle shape, until you reach the end. Repeat with remaining pastry and filling.
06 - Arrange the crisps on the prepared baking sheet. Brush the tops with more melted butter and sprinkle with sesame seeds if desired.
07 - Bake for 18–20 minutes, or until the crisps are golden brown and crisp. Serve warm or at room temperature.