Preheat the oven to 400 degrees f. 

Place the potatoes on a flat, rimmed baking sheet, and pour in 3/4 cup water.

Cover tightly with foil then bake for about 25-30 minutes or until fork tender. Drain any remaining water.

Drizzle potatoes with oil then toss to coat well and space evenly on the baking sheet. 

Place a 2nd baking sheet on top of it, then press it down, until all the potatoes are smashed to about 1/2 inch thick. 

Sprinkle with the thyme, and season with sea salt and pepper.

Return to the 400 degree oven and cook, uncovered for an additional 25-30 minutes.