Preheat oven to 400 degrees. Prepare produce: cut potatoes into one-inch pieces, dice the onion, and crush or mince garlic cloves.
5 pounds red-skinned potatoes, ½ yellow onion, 2 cloves garlic
Add potatoes, onion, garlic, butter, olive oil, dried parsley, smoked paprika, black pepper, and sea salt to a large bowl and toss until potatoes are evenly coated.
3 tablespoons unsalted butter, 1 tablespoon olive oil, 1 tablespoon dried parsley, ½ teaspoon smoked paprika, ½ teaspoon black pepper, sea salt
Spread potato mixture onto sheet pan in a single layer. Ensure there is at least ½ inch between each potato piece. This is key to getting the potatoes nice and crispy. Depending on the size of your pan, it may be necessary to divide between more than one pan or cook in batches.
Place pan in oven and roast for 30-35 minutes or until potatoes are golden brown and crispy. Gently shake pan to turn potatoes once or twice during bake time.
Remove finished potatoes from oven and serve warm. Garnish with green onion, if desired.
2 stalks green onion