Pat the steak dry and season it with salt and pepper.
Preheat a heavy skillet over medium-high heat and add a teaspoon of olive oil.
Place the steak in the skillet and sear for about 3-4 minutes per side for medium-rare, adjusting time based on thickness.
Meanwhile, preheat your oven to 425°F. Dice the potato into 1/2-inch cubes, toss with a little olive oil, salt, and pepper, and spread on a baking sheet.
Roast the potatoes in the oven for 20-25 minutes until crispy and tender, stirring halfway through.
When the steak is nearly done, reduce the heat to medium-low, add the butter and minced garlic (from 2 cloves) to the skillet, and baste the steak with the garlic butter for about 1 minute.
Blanch or steam the green beans until they are tender yet crisp, around 3-4 minutes.
Plate the steak along with a serving of roasted potatoes and green beans. Drizzle any remaining garlic butter from the pan over the steak.
Serve immediately and enjoy your balanced, flavorful meal.