01 - Bring a large pot of salted water to a boil. Add the green beans and cook for 3–4 minutes, until bright green and crisp-tender. Drain and immediately plunge into a bowl of ice water to stop the cooking. Drain again and pat dry.
02 - In a large skillet over medium heat, toast the sliced almonds, stirring frequently, for 2–3 minutes until golden and fragrant. Remove almonds from the skillet and set aside.
03 - In the same skillet, add butter and olive oil. Once melted, add the minced garlic and sauté for 1 minute until fragrant, being careful not to brown.
04 - Add the green beans to the skillet and toss to coat in the garlic butter. Sauté for 2–3 minutes until heated through.
05 - Add lemon zest, lemon juice, salt, and pepper. Toss well to combine. Remove from heat and transfer to a serving platter. Top with toasted almonds and sprinkle with chopped parsley if desired. Serve immediately.