POTATO PARBOIL: Place baby potatoes in a pot of cold water with 1 tbsp sea salt and 1/2 tsp baking soda. Bring to a boil and simmer for 15-18 minutes until fork-tender. Drain thoroughly and let steam dry in the colander for 5 minutes.
THE CRUNCH SMASH: Preheat oven to 220°C (430°F). Arrange dry potatoes on a baking sheet. Using the bottom of a heavy glass, press down gently until flattened to 1/2-inch thickness with rough, jagged edges. Drizzle with 1 tbsp avocado oil, sea salt, and black pepper. Roast for 25 minutes until deeply golden, blistered, and ultra-crispy.
STEAK PREPARATION: Pat ribeye cubes thoroughly dry with paper towels (surface moisture prevents the Maillard crust). Season generously with coarse sea salt and cracked black pepper immediately before searing.
FLASH SEAR: Heat a 12-inch heavy cast-iron skillet over high heat until wisps of smoke appear. Add 1 tbsp avocado oil. Add steak bites in a single uncrowded layer (sear in two batches if necessary). Sear undisturbed for 90 seconds to lock in a deep brown crust, flip, and sear the other side for another 60-90 seconds. Transfer immediately to a warm resting plate.
COWBOY HERB BUTTER: Reduce skillet heat to medium-low. Add butter, letting it foam and sizzle. Stir in minced garlic, Dijon mustard, fresh thyme, and red chili flakes. Cook for 60 seconds until garlic is fragrant and translucent without burning.
TOSS & SERVE: Return seared steak bites and any resting juices back to the skillet. Remove from heat immediately. Toss rapidly to coat in glossy garlic herb butter. Scatter fresh parsley and serve alongside the crackling smashed potatoes right from the sizzling skillet.
Achieving maximum flavor requires two distinct chemical processes: the Maillard reaction (reducing sugars reacting with amino acids at temperatures above 140°C/284°F) and starch retrogradation. First, searing high-protein ribeye cubes in avocado oil at extreme heat forms a deeply caramelized savory crust in under 3 minutes without overcooking the medium-rare core. Second, parboiling Yukon Gold potatoes in alkaline water (pH ~8.5 via baking soda) breaks down pectin, producing a fluffy outer slurry. When smashed and roasted at 220°C (430°F), this gelatinized starch dehydrates into micro-craters of unmatched crunch.
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