Preheat your oven to 350°F (175°C). Arrange the sliced strawberries on a baking sheet and sprinkle with sugar.
Roast until they become tender, about 25 minutes, stirring halfway through. Once done, remove from the oven and allow the strawberries to cool slightly on the baking sheet for about 15 minutes.
Transfer the strawberries to a food processor or blender. Add the sweetened condensed milk, vanilla extract, and a pinch of salt. Process until the mixture is smooth, about 30 seconds to 1 minute.
Pour the mixture into a small bowl and refrigerate, uncovered, until it cools completely, which should take about 20 minutes.
In a stand mixer fitted with a whisk attachment, beat the heavy cream quickly until stiff peaks form. This will take approximately 2 to 3 minutes.
Add in the sour cream and whip again until blended with softs peaks.
Pour the cooled strawberry mixture into the whipped cream and fold until all ingredients are incorporated.
Transfer the combined mixture to a 9-by-5-inch loaf pan. Press a sheet of plastic wrap directly onto the surface of the ice cream to prevent ice crystals from forming. Place the pan in the freezer and freeze until firm, at least 6 to 12 hours. For the best texture, allow the ice cream to freeze overnight.
Video
Notes
Serve and Store:Before serving, remove the ice cream from the freezer and let it sit at room temperature for about 5 minutes to soften slightly. Scoop the ice cream into bowls or cones, and enjoy! Store in a freezer-safe container in the freezer for up to 1 month.