Lemon Blueberry Ice Cream

Bahan-bahan (6 porsi)

• 2 cups fresh or frozen blueberries
• ¼ cup sugar
• 1 teaspoon cornstarch
• 2 tablespoons water
• 7 ounces sweetened condensed milk (exactly half of a standard 14-ounce can )
• ½ cup fresh lemon juice (about 3 large lemon's worth)
• 3 tablespoons fresh lemon zest (finely minced, about 1½ large lemon's worth)
• 1 cup heavy cream
• 1 cup milk
• ½ cup sugar
• ⅛ teaspoon kosher salt
• ½ teaspoon vanilla