Clean potatoes and place in a large pot. Cover with water, add salt and bring to boil. Cook 15-20 minutes, until potatoes are tender.
Drain, but leave potatoes in pot.
Add the Bacon Up bacon grease and toss with garlic, rosemary, and smoked paprika.
Transfer coated potatoes to a rimmed baking sheet, covered with foil or parchment paper. Using a potato smasher or the bottom of a small glass or mason jar, flatten each potato into a disc or patty. Season with salt and pepper to taste, then sprinkle the cheese on top.
Bake about 20 minutes until cheese is melted and the potatoes are crispy on the bottom.