01 -
Make pie dough 2 hours ahead, chill. Roll out to 12 inches, fit into 9-inch dish, crimp edges, chill 30 minutes.
02 -
Preheat oven to 375°F. Line crust with parchment and weights, bake 15-16 minutes. Remove weights, prick bottom, bake 14-15 minutes. Cool fully.
03 -
Whisk egg yolks and cornstarch together, set aside.
04 -
Whisk milk, cream, sugar, and salt in a saucepan over medium until simmering.
05 -
Whisk 1/2 cup hot mix into yolks slowly, then pour yolk mix back into pot, whisking constantly.
06 -
Cook 1 minute until thick, remove from heat, stir in vanilla and butter. Cool 15 minutes.
07 -
Slice 2-3 bananas into crust, sprinkle with cinnamon if using, spread custard over top. Cover with plastic wrap, chill 4 hours.
08 -
Whip cream, sugar, and vanilla to medium peaks. Spread or pipe on pie, garnish with banana slices just before serving.