01 - Preheat oven to 350°F. Grease a 9x13 inch baking dish with melted butter.
02 - Combine walnuts, pistachios, almonds, sugar, and cinnamon in a bowl. Mix well.
03 - Unroll phyllo dough and cover with a damp towel to prevent drying while working.
04 - Place 8 sheets of phyllo in the dish, brushing each sheet generously with melted butter before adding the next.
05 - Spread about one-third of the nut mixture evenly over the phyllo.
06 - Add 4 more sheets of phyllo, brushing each with butter. Spread half of remaining nuts on top.
07 - Add 4 more phyllo sheets, buttering each one. Sprinkle remaining nut mixture evenly.
08 - Layer remaining phyllo sheets on top, brushing each sheet with butter as you work.
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 - While baking, 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 over baklava when removed from oven. Let cool completely to absorb syrup before serving.