Preheat the oven to 425 degrees and prepare a baking sheet by lining with parchment or aluminum foil. Set aside.
In a large bowl, mix together the olive oil, garlic, lemon juice, salt and pepper until well combined.
Toss the prepared green beans in the flavored oil until fully coated.
Spread the green beans onto the prepared baking sheet in a single layer.
Roast in the preheated oven for 15-20 minutes or until tender.
Remove from the oven and serve.