Preheat oven to 400ºF and prepare a baking sheet with parchment paper.
Caramelize your onions - cook over low-medium heat in 1-2 tbsp of oil for about 45 minutes until dark brown and soft.
Lay Pillsbury pie crust out on the pan.
Mix potatoes and cheese in a bowl, then add in a pinch salt and pepper to season.
Once onions are finished, add into the potato mixture along with your herbs.
Spread mixture over the pie crust, leaving about 2 inches around the edges. fold the crust up over the mixture to make a ring.
Brush milk over the edge of the crust to help with color when baking.
Bake for 45 minutes, or until crust is golden brown and potatoes are tender.
Sprinkle with any more seasonings you’d like and serve warm!