01 - Preheat oven to 350°F. Brush a 9x13 inch baking dish with melted butter.
02 - Combine walnuts, pistachios, almonds, sugar, and cinnamon in a bowl. Mix thoroughly.
03 - Unroll phyllo dough and cover with a damp towel to prevent drying while working.
04 - Place 8 sheets of phyllo in the prepared dish, brushing each sheet generously with melted butter before adding the next.
05 - Sprinkle about one-third of the nut mixture evenly over the phyllo base.
06 - Add 4 more phyllo sheets, brushing each with butter. Spread half of the remaining nuts over the layer.
07 - Add 4 more phyllo sheets, buttering each one. Sprinkle the final layer of nuts evenly.
08 - Layer remaining phyllo sheets on top, brushing each sheet with melted butter.
09 - Using a sharp knife, cut the baklava into diamond or square shapes before baking.
10 - Bake for 35-40 minutes until golden brown and crisp.
11 - Combine water, sugar, lemon juice, honey, cinnamon stick, and orange peel in a saucepan. Bring to boil, then simmer for 10 minutes. Remove cinnamon stick and orange peel, let cool slightly.
12 - Immediately pour hot syrup evenly over baked baklava. Allow to cool completely before serving to ensure full syrup absorption.