01 - Preheat oven to 340°F. Grease a 9x13-inch baking dish with melted butter.
02 - Combine walnuts, pistachios, almonds, cinnamon, cloves, and sugar in a bowl. Mix thoroughly.
03 - Unroll phyllo and cover with a damp cloth to prevent drying.
04 - Place one phyllo sheet in the dish, brush with butter. Repeat with 7 more sheets (8 total), buttering each layer.
05 - Sprinkle 1/3 of nut mixture evenly over phyllo.
06 - Add 4 phyllo sheets, brushing each with butter. Sprinkle another 1/3 of nut mixture.
07 - Add 4 more phyllo sheets, buttering each. Sprinkle remaining nut mixture.
08 - Layer remaining 4 phyllo sheets, buttering each. Brush top generously.
09 - Using a sharp knife, cut baklava into diamond or square shapes before baking.
10 - Bake 45-50 minutes until golden and crisp.
11 - Combine sugar, water, honey, cinnamon stick, and lemon peel in saucepan. Boil, then simmer 10 minutes. Cool slightly and remove cinnamon and peel.
12 - Pour warm syrup evenly over baklava immediately after removing from oven. Cool completely before serving.