In the bowl of an electric stand mixer (or by hand with some muscle strength), beat the heavy whipping cream over medium high speed, until stiff peaks form (a tad stiffer than if you were making whipped cream), then pour in the sweetened condensed milk. Mix, or fold, for about 30 seconds until the mixture is fully combined. Stir in vanilla extract and dash of salt.
Fold the crumb topping in the ice cream base and stir. Fold in ¼ cup of the blueberry sauce creating a swirl while you mix, and reserve the remaining sauce for the top.
Using a 9x5 loaf pan (or a freezer safe bowl), pour the blueberry swirl ice cream into the pan and spread evenly with a rubber spatula. Add the remaining blueberry sauce over the top and use the spatula or a butter knife to create swirls over the top.
Cover the ice cream tightly with foil and place in the freezer for 8 hours until firm enough to eat. ENJOY!