Preheat your oven to 375°F (190°C), or 350°F (180°C) if you’re using a toaster oven*.
While the oven warms up, bring your potatoes to room temperature (you can skip this if you don’t have time, but colder potatoes will take longer to heat).
Remove any salsa or sour cream.
Optional: Add extra cheese on top of your potatoes.
Heat your potatoes for 15-20 minutes.
For added crispiness, switch on your broiler for 2 minutes at the end of this process.
Add fresh salsa or sour cream before serving.