Firstly, slice the hasselback potatoes by cutting even thin slices down each potato going most of the way through each potato. (See Step 1 in the Instructions section above for my tips on how to do this).
Finely dice the rosemary and thyme adding to a bowl with the salt, garlic granules and mix.
Add the potatoes to a large baking dish, drizzle over olive oil and top with the herb salt and bake in the oven at 200C (fan oven) or 390F for 1 hour.
Remove from the oven and serve straight to the table.
Video
Notes
Step-by-Step Photos: My blog post includes helpful step-by-step photos to help guide you through making this recipe.Substitutions & Variations: I have included a list of these in the post above.To Store: Simply place in a sealed container in the fridge overnight. You can either reheat in the oven or air fryer the next day for lunch or dinner.To Freeze:I find that cooked potatoes don't freeze that well, so eat within a few days.Tip 1: Laying chopsticks or the handles of wooden spoons either side of the potato helps to stop you slicing all the way through.Tip 2: Make sure to get the oil and herbs right into the slits for maximum flavour.Tip 3: Use good quality flakey sea salt for best results.