How to Make It
Prepare the Crust: Process pistachios in a mini or regular food processor until finely ground, about 1 minute. Beat butter and sugar with a stand mixer fitted with a paddle attachment on medium speed until creamy, about 2 minutes. Add ground pistachios, vanilla, and salt to butter mixture; beat until combined, about 30 seconds. Add flour; beat on low speed until crumbly, about 1 minute. Transfer dough to a 9-inch fluted tart pan with a removable bottom. Press dough evenly up sides and around bottom of pan. Chill until firm, about 30 minutes. Meanwhile, preheat oven to 300°F.
Remove Crust from fridge; prick all over with a fork. Bake in preheated oven until light golden, about 35 minutes. Let cool slightly, about 5 minutes.
While Crust bakes, prepare the Filling: Whisk together eggs, yolks, sugar, lime zest, and lime juice in a medium saucepan until smooth. Cook over medium, whisking constantly, until thick and glossy, 6 to 10 minutes. Remove from heat; pour into a medium-size heatproof bowl. Gradually whisk in butter a few pieces at a time, waitinguntil melted before next addition. Set aside until ready to use.
Pour Filling into prepared Crust. Let cool at room temperature about 30 minutes. Refrigerate until firm, at least 2 hours or up to overnight. Decorate top with raspberries; slice and serve.