Crème Fraîche Ice Cream with Triple Berry Sauce

for the crème fraîche ice cream:

1. Prepare an ice bath in a very large bowl, adding cold water and plenty of ice, until bowl is about half to two-thirds full. Set aside.
2. In a medium-large saucepan over medium-high heat, bring milk and cream to a gentle boil, stirring almost constantly, and then immediately remove saucepan from heat. In a medium bowl, whisk egg yolks and sugar together until very well incorporated. Then slowly pour about 1/3 of the hot milk and cream mixture into the egg yolks, whisking constantly. This tempering of the yolks will ensure that they do not "scramble". Then whisk the heated yolk mixture back into the saucepan with the remaining hot milk and cream.
3. Return saucepan to medium-low heat and gently cook, constantly stirring and scraping the bottom of the pan, until mixture is thick enough to coat the back of a wooden spoon (about 170° on an instant-read thermometer). This will take 20 to 30 minutes.
4. Float the saucepan in the prepared ice bath, holding onto the handle and taking care to not let the saucepan sink too far into the water so that water gets into the saucepan. Stir constantly until mixture is completely chilled. Pour ice cream base into a bowl, cover it, and then chill for 4 hours or overnight.
5. When ready to churn, pour chilled ice cream base through a fine mesh strainer into a large bowl. Whisk the crème fraîche, corn syrup, and salt into the ice cream base until it is completely smooth.
6. Freeze in an ice cream machine according to manufacturer's instructions, until ice cream is light and fluffy. I have a smaller ice cream machine, so needed to freeze the ice cream base in two separate batches. Place finished ice cream in the freezer for about 4 hours to firm up before serving.

for the triple berry sauce:

1. Place all berries in a blender or food processor, and purée. Place a fine mesh strainer over a bowl and line the strainer with a double layer of cheese cloth. Pour half the berry mixture through the cheesecloth. To get the maximum amount of juice out of the berries, gather up the cheesecloth and press on the berries with the back of a large wooden spoon, until all that's left is seeds in the cheesecloth. Discard cheesecloth.
2. Add remaining pureed berries to the strained berry juice. Stir in sugar and lemon juice. Pour into a medium saucepan and place over medium to medium-high heat. Bring to a gentle boil. Reduce heat to medium and cook for about 5 minutes, stirring frequently. Reduce heat to low and continue cooking for 8 to 10 minutes more, stirring regularly.
3. When the sauce is done, it should be reduced by about half, with a vivid berry color. Cool to room temperature. Store in refrigerator and use within a few days.