Preheat the oven to 400°F for roasting the potatoes and green beans.
Wash and cube the potato; toss with a little olive oil, salt, and pepper, and spread on a baking sheet.
Trim the green beans and toss them lightly with salt and pepper; place them on the baking sheet with the potatoes.
Roast the potatoes and green beans in the oven for about 20-25 minutes until golden and tender.
While the vegetables roast, pat the steak dry and season it generously with salt and black pepper.
Heat a skillet over medium-high heat; add the steak and sear it for about 3-4 minutes per side for medium-rare (adjust timing for desired doneness).
In the last minute of cooking, add a tablespoon of unsalted butter and a crushed garlic clove to the skillet, spooning the melted garlic butter over the steak for added flavor.
Remove the steak from the pan and let it rest for a few minutes before slicing.
Plate the steak alongside the roasted potatoes and green beans, then drizzle any remaining garlic butter from the pan over the top.
Serve immediately and enjoy your flavorful and balanced meal.