Prepare the potatoes

• Peel the potatoes and cut them into even sticks
• Rinse them in cold water and dry them well

First fry the potatoes

• Heat the oil in a saucepan to about 150 °C
• Fry the potatoes until soft but pale
• Lift them out with a slotted spoon and drain

Cook the steak

• Season the steak with salt and pepper
• Sear it in a hot pan on both sides
• Add the butter, garlic and thyme and baste the steak

Rest the steak

• Transfer the steak to a board and let it rest before slicing

Finish the fries

• Raise the oil to about 180 °C
• Fry the potatoes a second time until golden and crisp
• Drain and season with salt

Serve

• Slice the steak and serve it with the hot fries