01 -
Pat steaks dry and season both sides generously with salt, black pepper, dried thyme, and dried rosemary.
02 -
Heat olive oil in a skillet over medium-high heat until shimmering. Sear steaks for 3–4 minutes per side to develop a golden-brown crust while retaining a medium-rare interior.
03 -
Transfer seared steaks to a plate and let rest. Once rested, slice steaks into thin strips or bite-sized pieces.
04 -
Reduce skillet heat to medium. Add butter and minced garlic, stirring until butter is melted and garlic is aromatic, about 1–2 minutes. Remove from heat.
05 -
Peel Russet potatoes and slice thinly to approximately 3 mm thickness, ideally using a mandoline for consistency.
06 -
In a large mixing bowl, toss potato slices with half of the garlic butter mixture, salt, pepper, and an extra sprinkle of thyme and rosemary.
07 -
Arrange half of the potato slices evenly in an oven-safe baking dish. Spread steak pieces over the potatoes and sprinkle with half of the shredded Cheddar cheese.
08 -
Top with remaining potatoes, drizzle with the rest of the garlic butter mixture, and cover with the remaining Cheddar cheese.
09 -
Cover the baking dish with aluminum foil and bake in a preheated oven at 190°C for 40 minutes.
10 -
Remove foil and bake for an additional 15 minutes, allowing the cheese to turn golden and potatoes to become tender.
11 -
Let the casserole rest for 5–10 minutes after baking to allow flavors to meld and the dish to set before serving.