01 - Preheat oven to 340°F. Generously grease a 9x13-inch baking dish with melted butter.
02 - Combine walnuts, pistachios, almonds, cinnamon, cloves, and sugar in a bowl. Mix thoroughly to distribute spices evenly.
03 - Unroll phyllo dough and cover immediately with a lightly damp towel to prevent drying and cracking during assembly.
04 - Place one phyllo sheet in the prepared dish. Brush lightly with melted butter. Repeat with 7 more sheets, brushing each layer with butter for a total of 8 bottom sheets.
05 - Sprinkle 1/3 of the nut mixture evenly across the buttered phyllo surface.
06 - Add 4 more phyllo sheets, brushing each with butter. Sprinkle another 1/3 of the nut mixture over the surface.
07 - Add another 4 phyllo sheets, brushing each with butter. Sprinkle the remaining nut mixture evenly over the dough.
08 - Top with the remaining 4 phyllo sheets, brushing each with butter. Generously brush the top surface with additional butter.
09 - Using a sharp knife, carefully cut the assembled baklava into diamond or square shapes before baking. This ensures clean cuts and allows syrup to penetrate.
10 - Bake for 45-50 minutes until the phyllo turns golden brown and crisp. Watch carefully during the last 10 minutes to prevent over-browning.
11 - While baklava bakes, combine sugar, water, honey, cinnamon stick, and lemon peel in a saucepan. Bring to a boil, then reduce heat and simmer for 10 minutes until slightly thickened. Remove from heat, discard cinnamon stick and lemon peel, and let cool until warm.
12 - Immediately pour the warm syrup slowly and evenly over the hot baklava. Allow to cool completely in the dish before serving to let the syrup fully absorb.