An all-butter crust is filled with vanilla-spiked custard, which gets baked until golden brown. Much like a Key lime pie, a frozen margarita pie is all about highlighting that lime flavor.
Stir in sugar, cornstarch, salt, vanilla, and pieces of butter. Gently mix in diced nectarines. Pour fruit and custard filling carefully into pie shell, making sure fruit is evenly distributed.
Place over medium heat and cook, whisking constantly, until pudding bubbles and thickens and whisk leaves a slight impression in custard ... coconut oil and vanilla. Cool slightly, then pour ...