Pat dry ribeye with paper towel. Season both sides with salt and pepper.
In the bottom of a heavy saute pan heat 2 tablespoons of vegetable oil on medium-high heat until oil becomes thin and smokes in the pan (about 5 minutes).
Sear steak for 4 minutes on each side. Add garlic clove, thyme, and butter to the pan. Baste steak with butter for 5 minutes to impart flavor. Then remove the steak and allow it to rest.
On a lined baking sheet, smash cooked potatoes, adding salt, pepper, parmesan, and olive oil. Broil for 10 minutes until golden brown.
In a sauce pot on medium heat, simmer the oil and garlic for about 3 minutes. Add heavy cream, and gently bring to a simmer for about 5 minutes. Add whole-seed mustard, parmesan, butter, and lemon juice; season with salt and pepper.
Recipe by Cooking TV Recipes at https://cookingtv-channel.com/steak-cream-sauce/