-Preheat your oven to 375 degrees regular bake. Oven rack second from the bottom.
-Lightly butter a 9″pie dish or 9″x9″square baking dish or a medium sized au gratin dish. Set aside.
-In a large non-stick skillet, over medium heat, melt the butter and add the sliced leeks.
-Saute this until tender, stirring often for about 10 minutes. Add the minced garlic and cook until fragrant for a minute or so. Do not let the garlic brown.
-Add the cream, milk, Kosher salt and pepper and Hungarian paprika. Bring this mixture to a simmer and then add the sliced potatoes. Cook this for 5minutes, then stir in the fresh chopped thyme leaves.
-Combine the both cheeses in a small bowl.
-Transfer 1/3 of the potato and leek mixture to the prepared buttered baking dish. Sprinkle with 1/3 of the combined grated cheeses. Repeat this layering, pouring some of the cream mixture between each layer over the grated cheese.
-Place in your pre-heated oven and bake for 45 to 55 minutes of until the potatoes are tender and the top is golden brown.
-Remove from the oven and allow to cool for 15 minutes.
You can garnish with a pinch or two or paprika and chopped chives. ENJOY!! Remember that this can be easily doubled and freeze extras. Enjoy!