Toss the strawberries with 2 teaspoons sugar in a small bowl. Let sit 20 minutes to macerate.
Meanwhile, put the sour cream, 2 tablespoons sugar, and salt in a large bowl and beat with an electric mixer on medium-high speed until smooth. Add the heavy cream and continue to beat until thick and fluffy. Swirl in streaks of the strawberry jam. Transfer to a decorative dip bowl and refrigerate until ready to serve. Top with the macerated strawberries and serve with dippers.
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