In a small skillet on medium heat, toast nuts until lightly browned. Set aside.
Bring a pot of water to a boil. Cook green beans for 3-4 minutes or until tender but crisp.
Drain beans in a colander, then place in an ice water bath. Drain again in a colander. Pat dry, and set aside.
For the gremolata topping, in a large bowl combine parsley, lemon zest, parmesan, garlic, and the toasted nuts.
Heat olive oil in a large skillet on medium-high heat. When hot, add beans and sauté for 2 minutes, or until heated through.
Transfer the beans to a serving bowl and top or toss with gremolata. Salt and pepper to taste.