1Preheat oven to 375°F. Grease a baking dish with olive oil.
2Heat olive oil in a skillet and cook the onion and garlic until softened.
3Add ground beef, paprika, italian seasoning, salt, and pepper. Cook until browned, then drain excess grease.
4Arrange half of the sliced potatoes in the baking dish and season lightly with salt and pepper.
5Spread the cooked ground beef evenly over the potatoes.
6Add the remaining potato slices on top.
7Whisk together heavy cream and milk, then pour evenly over the potatoes.
8Sprinkle cheddar and mozzarella cheese over the top.
9Cover with foil and bake for 40 minutes. Remove the foil and bake for another 20–25 minutes, until the potatoes are tender and the cheese is golden and bubbly.
10Garnish with fresh parsley, let rest for a few minutes, then slice and serve!