Start the custard base. In a medium bowl, whisk the egg yolks and the sugar together until it turns a light yellow color. In a medium saucepan, combine the heavy cream and the milk. Cut the vanilla bean pod in half, and scrape it into the saucepan with the milk mixture, stirring to distribute. Heat the milk mixture over medium-low heat, until it begins to simmer. Remove from heat.
Temper the eggs. Slowly add milk mixture to eggs and sugar, stirring constantly so you don’t cook the eggs to create your custard base. Add the custard base back to the saucepan.
Cook the custard. Return to heat until temperature reaches 165° F. Stirring constantly so the eggs in the custard don’t cook on the edges of the pan. Visually, you’ll know the custard is done once it starts to thicken. Remove from heat.
Chill your custard. Pour custard through a fine-mesh sieve, and store either in a bowl covered with plastic wrap or in an airtight container in the fridge for 4 hours or overnight.
Churn the custard. Once the custard base is chilled, stir in salt. Then pour it into your ice cream maker and process according to your ice cream maker’s instructions. (With my Cuisinart Compressor Ice Cream Maker, this took 30-35 minutes.)
Layer the custard and the strawberry. Layer the strawberry sauce and the custard base in a freezer-safe container and use a butter knife to swirl the two together, being careful not to over-swirl (trust me, you want there to be some distinct ribbons of strawberry in every scoop). Freeze for 3-4 hours or until the ice cream reaches your desired, scoopable texture.