01 - Pulse flour, powdered sugar, and salt in a food processor. Add cold cubed butter and pulse until mixture resembles coarse crumbs. Add egg yolk and 1 tablespoon cold water; pulse until dough begins to come together, adding more water if necessary. Gather dough into a ball, flatten into a disk, wrap in plastic, and refrigerate for 30 minutes.
02 - Preheat oven to 350°F. Roll out chilled dough and press into six 4-inch tart pans. Prick bottoms with a fork. Line with parchment paper and fill with pie weights. Bake for 12 minutes. Remove weights and parchment, then bake 8-10 minutes longer until golden brown. Cool completely in pans.
03 - Combine milk, heavy cream, and honey in a saucepan. Heat until just simmering. Meanwhile, whisk egg yolks, cornstarch, vanilla extract, and salt in a bowl. Gradually whisk hot milk mixture into yolks, then return entire mixture to saucepan. Cook over medium heat, stirring constantly, until thickened (3-4 minutes). Transfer to bowl, cover with plastic wrap touching surface, and cool to room temperature.
04 - Whisk eggs, egg yolks, sugar, lemon juice, and lemon zest in a saucepan. Cook over medium-low heat, stirring continuously, until thickened (5-7 minutes). Do not let mixture boil. Remove from heat and whisk in cubed butter until smooth. Pour into bowl, cover with plastic wrap touching surface, and refrigerate until set.
05 - Spoon chilled honey custard into cooled tart shells, smoothing tops. Spread layer of lemon curd over custard. Arrange fresh strawberry slices on top. Garnish with mint leaves if desired. Serve chilled or refrigerate until ready to serve.