Preheat oven to 350 degree Fahrenheit with the rack in the middle.
In a saucepan, heat the strawberries with 3/4 cup sugar, water, lemon juice, vanilla and 1/2 tsp cinnamon. Bring to a boil then down to a simmer, cooking for 30 minutes until the sauce thickens into a jammy consistency. Whisk in the cornstarch if needed. Set aside to cool and thicken a bit more.
Brush the bottom of a 9x13 inch baking dish with melted butter, add a layer of phyllo pastry, brush with more butter and add another layer of dough. Do this until you have 6 layers of pastry dough lining the dish.
Layer on a thin layer of the strawberries and then the almonds. Place a layer of phyllo dough, then some melted butter. Do this for 5 layers of dough. Continue these layers until you have 3 layers of strawberries/almonds, always brushing melted butter in between layers of phyllo dough. For the top layer, use 10 sheets of phyllo dough brushing butter between each. Brush the top layer with butter too. Score/slice the dough with a sharp knife into desired portions.
Bake for 40-45 minutes or until golden brown. Top with 1/2 of the syrup and let cool. Serve with more syrup.
While the baklava is baking make the maple sauce. Boil the remainder of the granulated sugar (1/2 cup) with the maple syrup, the rest of the cinnamon and a pinch of salt in a saucepan until the sugar dissolves into the maple syrup forming a syrup.