Wash and trim the green beans. Cut them into smaller, bite-sized pieces if desired.

Bring a large pot of salted water to a boil. Add the green beans and blanch for 3-5 minutes, until they are bright green and slightly tender-crisp. Drain the beans in a colander and immediately rinse with cold water to stop the cooking process.

In a large bowl, heat the olive oil over medium heat. Add the minced garlic and sauté for about 30 seconds, until fragrant. Be careful not to burn the garlic.

Add the blanched green beans to the bowl with the garlic-infused oil. Stir in the pesto, salt, and pepper. Toss to coat the beans evenly.

Serve the pesto beans immediately. Garnish with pine nuts or grated Parmesan cheese, if desired.