01 - Preheat your oven to 350°F. Grease a 9x13 inch baking dish with melted butter.
02 - Combine chopped 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, buttering each one. Spread half of the remaining nuts evenly.
07 - Layer 4 additional phyllo sheets with butter between each. Sprinkle the final layer of nuts.
08 - Complete with remaining phyllo sheets, brushing each layer with melted butter.
09 - Using a sharp knife, cut the baklava into diamonds or squares 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 a boil, then simmer for 10 minutes. Remove cinnamon and peel, let cool slightly.
12 - Immediately pour hot syrup evenly over the entire baked baklava. Allow to cool completely to absorb syrup before serving.