Preheat oven to 400 and remove phyllo dough from freezer to thaw.
Thinly slice potatoes and toss and coat in melted butter, oil, thyme, salt and pepper.
Thinly slice shallots and add to a skillet with 1 tbsp butter, a pinch of salt and pepper. Cook stirring often on medium to low heat for about 15 min or until the shallots are cooked down and a deep brown.
Add all filling ingredients to a bowl and mix to combine.
Melt remaining butter and brush one sheet of phyllo dough. Add another sheet on top and repeat with remaining 5 layers, brushing with butter between each layer.
Add filling to the middle and then layer the potatoes in a circular pattern. Crinkle the phyllo dough in on each side to create the crust. If the dough is flaking, add a little melted butter to those edges. Brush the top with more butter and sprinkle with more thyme leaves. Bake for about 30 min or until nicely golden brown. Drizzle the top with balsamic glaze and serve. Enjoy!