01 - Bring a large pot of salted water to a boil. Add green beans and cook for 3 to 4 minutes until bright green and crisp-tender. Drain and immediately submerge in ice water to halt cooking. Drain again and pat dry.
02 - Toast sliced almonds in a large skillet over medium heat, stirring frequently, for 2 to 3 minutes until golden and fragrant. Remove and set aside.
03 - In the same skillet, melt butter with olive oil. Add minced garlic and sauté for 1 minute until fragrant, avoiding browning.
04 - Add the blanched green beans to the skillet and toss to coat with garlic butter. Sauté for 2 to 3 minutes until heated through.
05 - Stir in lemon zest, lemon juice, kosher salt, and black pepper. Toss thoroughly to combine flavors.
06 - Remove from heat and transfer to a serving dish. Top with toasted almonds and sprinkle with chopped parsley if desired.
07 - Serve immediately while warm.