

I’m guessing here, but if I wanted to make this, I would par-bake the potato @ 350°F / 180° C for about 10-15 minutes, freeze it, then cut, then deep fry for 3-7 minutes.
Looks delicious however they did it.
Edit: https://www.allrecipes.com/bloomin-potato-recipe-11893783
They used a microwave and conventional oven. Also they cut it first.



https://www.allrecipes.com/bloomin-potato-recipe-11893783
Personally I would deep fry it rather than bake it, but to each their own