01 - Preheat the oven to 340°F. Grease a 9x13-inch baking dish with a small amount of melted butter.
02 - Combine walnuts, pistachios, almonds, cinnamon, cloves, and sugar in a bowl. Mix thoroughly until spices are evenly distributed throughout the nuts.
03 - Unroll the phyllo dough and cover immediately with a lightly damp cloth to prevent the sheets from drying out and becoming brittle.
04 - Place one sheet of phyllo in the prepared baking dish and brush lightly with melted butter. Repeat with 7 more sheets, brushing each layer with butter for a total of 8 sheets.
05 - Sprinkle one-third of the nut mixture evenly over the buttered phyllo base, ensuring complete coverage.
06 - Add 4 more sheets of phyllo, brushing each with butter. Sprinkle another one-third of the nut mixture evenly across the surface.
07 - Add another 4 sheets of phyllo, brushing each with butter. Sprinkle the remaining nut mixture evenly across the surface.
08 - Finish with the remaining 4 sheets of phyllo, brushing each with butter. Brush the top layer generously with melted butter.
09 - Using a sharp knife, carefully cut the assembled baklava into diamond or square shapes, cutting through all layers. This prevents the pastry from crumbling when cut after baking.
10 - Bake for 45 to 50 minutes until the baklava is golden brown and crisp. The top should appear evenly browned and the edges should be lifted slightly.
11 - While baklava bakes, combine sugar, water, honey, cinnamon stick, and lemon peel in a saucepan. Bring to a boil over medium-high heat, then reduce heat and simmer for 10 minutes until slightly thickened. Remove from heat and let cool slightly; discard cinnamon stick and lemon peel.
12 - As soon as baklava comes out of the oven, slowly pour the warm syrup evenly over the entire surface. Allow to cool completely in the baking dish before serving to ensure the syrup fully penetrates the layers.