To make the sugar syrup, start by adding the sugar, water, lemon juice in a saucepan on medium heat. Once it simmers, turn the heat down and let it simmer for 15 minutes. Set aside to cool down.
Preheat the oven to 180 Celsius degrees.
Melt the butter and the oil in the microwave. Set aside.
In a baking dish, brush the bottom with the melted butter mixture. Then lay a sheet of the phyllo pastry then brush with butter. Repeat the process with 15 more sheets. Top with a layer of pistachios and brush with some butter.
Continue with a layer of 6 more sheets and then sprinkle with another layer of pistachios.
Top the pistachio layer with one phyllo sheet and butter.
Repeat the same process with the remaining sheets with the remaining sheets and butter.
Brush the final layer of phyllo with butter. Cut it into diamond shapes.
Bake 40-45 minutes until golden brown.
Remove from the oven and pour the sugar syrup over it when it is hot. Set aside and let it cool down.
