Bring a pot of salted water to a boil.
- Add green beans and blanch for 2-3 minutes until bright green and slightly tender.
- Drain and transfer immediately to ice water to stop cooking; drain and pat dry.
- In a large skillet, melt butter or heat olive oil over medium heat.
- Add minced garlic and sauté for about 30 seconds until fragrant, avoiding burning.
- Add green beans and toss to coat in garlic butter.
- Cook for 3-5 minutes, stirring frequently, until heated through and slightly crisp.
- Season with salt, pepper, and optional lemon juice or red pepper flakes.
- Serve warm.