How to Make It
Finely grate 3 of the garlic cloves (you will have about 1 teaspoon); slice remaining 3 garlic cloves (you will have about 1 tablespoon). Set aside sliced garlic cloves. Stir together shrimp, oil, grated garlic, crushed red pepper, and 1/4 teaspoon of the salt in a medium bowl. Let stand 10 minutes.
Cook sliced garlic and 1 tablespoon of the butter in a large skillet over medium, stirring occasionally, until garlic starts to brown, about 2 minutes. Increase heat to high. Add shrimp mixture; cook, stirring occasionally, until shrimp is opaque, about 4 minutes. Remove shrimp from skillet with a slotted spoon. Add wine to skillet; bring to a boil over high, and boil until wine is slightly reduced, about 2 minutes. Remove from heat. Return shrimp to skillet, and add lemon zest, lemon juice, and remaining 2 tablespoons butter and 1/2 teaspoon salt. Toss until shrimp is well coated with sauce. Sprinkle with parsley. Serve immediately.