Preheat your oven to 425°F for the potatoes.
Dice the potato into evenly sized cubes, toss with half the olive oil, salt, and pepper, and spread on a baking sheet.
Roast the potatoes in the oven for about 20-25 minutes until crispy, stirring halfway through.
While the potatoes are roasting, heat a skillet over medium-high heat. Season the steak with salt and pepper.
Add the remaining olive oil to the skillet and sear the steak for about 3-4 minutes on each side for medium-rare, or adjust time to your preference.
Remove the steak from the skillet and let it rest.
In the same skillet, add minced garlic and sauté briefly until fragrant, then add the green beans.
Sauté the green beans for about 3-4 minutes until tender-crisp, seasoning with salt and pepper.
Plate the steak, roasted potatoes, and garlicky green beans together, and serve immediately.