Preheat the oven to 400°F. Lightly coat a baking sheet with nonstick spray.: When the oven reaches temperature you will notice a dry warmth that promotes immediate browning, which helps create a crisp exterior on the potatoes . A properly preheated oven ensures the heat penetrates from the start, giving you that desirable contrast between outside and inside. I often wait until the oven indicator cycles or use an oven thermometer if my oven runs cool. A common mistake is putting the tray into a cold oven, which yields dull, oily potatoes rather than crisp ones.
Pat the chopped potatoes dry with a paper towel to remove excess moisture.: The sheet should glint lightly with oil so the pieces do not stick, allowing them to turn freely and brown evenly. I prefer a very thin coat, because pooling oil can cause uneven crisping. If the tray is not prepared, the potatoes can cling and tear when you try to flip them, so do this step carefully.
In a large bowl, toss the potatoes with melted coconut oil and sprinkle with garlic, parsley, salt, and pepper.: Drying is crucial, because surface water creates steam and prevents browning, leaving the pieces limp rather than crisp. When I rub them gently with towels I can already see the difference in how they take on oil. If you skip this, expect much longer baking time and less crunch, so invest a minute in thorough drying.
Spread the seasoned potatoes in a single layer on the prepared baking sheet, allowing space for even cooking.: The aroma of warm coconut oil pairing with dried garlic starts building flavor even before baking, and tossing ensures the seasonings cling evenly to each piece. Mix until every chunk has a thin sheen of oil, which is the visual cue that they are ready for the sheet. Overcrowding the bowl while tossing can cause uneven coating, so use a roomy vessel and take your time.
Bake in the preheated oven for 25 minutes, stirring occasionally, until the potatoes are golden brown. For extra crispiness, broil for an additional 2-4 minutes, but keep a close eye to prevent burning.: When pieces touch too much they steam rather than roast, so leave a little breathing room to encourage crisp edges. The sound of hot oil beginning to sizzle when the tray hits the oven is your cue that the Maillard reaction is starting, producing rich toasted aromas. A common error is piling them, which yields soggy centers, so arrange them thoughtfully.
Remove the potatoes from the oven, sprinkle with shredded mozzarella cheese, and return to the oven for 3-4 minutes, or until the cheese is melted and bubbly.: As they roast you will see them transform from pale to amber to deep golden, and the kitchen will fill with a toasty scent that signals flavor development. Stirring ensures all sides get exposure to heat, which leads to even browning. If they are still pale after the recommended time, your pieces may be too large or the oven may run cool, so adjust accordingly. For extra crispiness broil for an additional 2 to 4 minutes but keep a close eye to prevent burning.
DEVOUR!: When the mozzarella cheese meets the warm potatoes it melts into glossy strands and little bubbles appear, offering both visual appeal and a silky mouthfeel. This finishing step softens the exterior slightly where the cheese seats, creating a luscious interplay of textures. Avoid leaving them too long under heat after adding cheese, because overbaking can make the cheese oily and rubbery rather than stretchy and melty.
DEVOUR: At this stage the sound of a fork tugging through melted mozzarella cheese and the fragrant steam rising will be irresistible. I recommend letting them rest for a minute so the cheese settles but do not wait too long or the crisp pockets will soften. The main mistake here is letting them cool completely, which reduces the enjoyment of that contrast between crispy edges and molten cheese.