Preheat the oven to 375°F (190°C).
Toss the strawberries with ¼ cup (50 gram) sugar, lemon juice, and salt.
1½ pound ripe strawberries, ½ cup granulated sugar, 1 teaspoon lemon juice, ½ teaspoon kosher salt
Spread the berries in an even layer a parchment-lined baking sheet.
Roast for 25-30 minutes, until jammy and fragrant.
Cool completely, then blend until smooth. Chill for at least one hour.
Heat the milk and cream in a saucepan until steaming but not boiling.
1½ cup whole milk, 1½ cup heavy cream
In a heatproof bowl, whisk the egg yolks with the remaining ¼ cup (50 gram) sugar.
5 large egg yolk
Slowly temper ¼ of the hot milk into the yolks, constantly whisking to combine.
Return the mixture to the saucepan and cook over medium-low heat until the custard reaches 170-175°F (76-79°C).
Strain through a fine mesh sieve into a bowl.
Stir in the vanilla extract, lemon zest, and salt. Cover and chill completely.
1 teaspoon vanilla extract, zest of 1 lemon
Whisk together the strawberry purée and chilled custard base.
Add ¼ cup (five to eight gram) fresh or freeze-dried strawberries.
¼ cup (optional) freeze-dried or fresh strawberries
Churn according to your ice cream maker’s instructions.
Transfer the ice cream to a container and freeze for two to four hours or until scoopable.