2 1/2 lbs russet potatoes(about 4 large or 6 small)
2-3tablespoonscanola or avocado oil
Coarse kosher salt,to taste
6tablespoonsbutter, cubed or sliced
2/3cupsour cream
1cupshredded Gruyere cheese
1/2 cup + 2 Tablespoons shredded parmesan, divided
4cloves fresh garlic, minced
4tablespoonsfresh rosemary, chopped and divided
freshly ground black pepper, to taste
Instructions
Preheat oven to 400° F. Line a baking sheet with nonstick foil or parchment paper.
Drizzle oil over clean russet potatoes then brush (or rub) to coat evenly. Place on baking sheet. Sprinkle all sides with a light coating of salt. Bake for 1 hour or until fork tender.
Cut potatoes in half lengthwise then scoop flesh into a large bowl. Place skins back on baking sheet.
To the bowl, add butter then use a masher to make potatoes smooth and incorporate the butter.
Add sour cream, Gruyere, 1/2 cup parmesan, garlic, 3 tablespoons rosemary, salt (to taste) and pepper. Mix well. Scoop potato mixture into potato skins. Sprinkle with remaining parmesan and rosemary.
Reduce heat to 350 °. Bake for 20-25 minutes or until tops are lightly golden brown.