Preheat the oven to 425°F (220°C).
Wash the green beans and pat them completely dry with a kitchen towel to ensure proper roasting.
On a large rimmed baking sheet, toss the green beans with olive oil, salt, pepper, and minced garlic until evenly coated.
Spread the green beans in a single, even layer on the baking sheet to prevent steaming.
Roast in the preheated oven for 12 to 15 minutes, tossing halfway through the cooking time, until tender-crisp and slightly blistered.
Remove from the oven and drizzle with lemon juice immediately before serving.