
Get ready. Bring a large pot of water to a boil over high heat. Set a large bowl with ice water near your stove.
Meanwhile, prepare the dressing. In a small bowl, whisk together the olive oil, lemon juice, garlic, fresh dill, Spanish paprika, and a pinch of salt and pepper. Set aside for now.
Cook the green beans. Add the green beans to the boiling water and cook for 5 minutes, then use tongs to transfer the green beans to the ice bath. Keeping the pot of boiling water going, let the green beans chill for 5 minutes. Return the beans to boiling water to finish cooking until tender, about 10 more minutes or so. Drain and pat dry with a clean kitchen towel.
Dress. Transfer the warm beans to a mixing bowl and toss with a little salt and pepper. Give the dressing a quick whisk to combine well, then pour over the green beans. Toss again to coat.
Finish and serve. Transfer to a serving platter. Sprinkle crushed pepper flakes and crumbled feta. Top with chopped olives. Serve at room temperature.