Refrigerate the cans of coconut milk overnight. Open each can and scoop only the thick, white coconut cream into a large bowl or the bowl of a stand mixer fitted with the whisk attachment; discard the watery liquid left in the can or refrigerate it for another use (it’s good for smoothies!). Whip the coconut cream using a handheld mixer or the stand mixer until it holds soft peaks.
In a food processor, combine 3 cups of the strawberries, vanilla, banana, stevia, and sea salt. Pulse until smooth.
Fold the strawberry mixture into the coconut whipped cream. Gently add the remaining sliced strawberries. Transfer the mixture to a lidded freezer-safe storage container & use the back of a spoon to level the top. Cover and freeze for 2 hours.
Scoop the mixture out with a spoon to "un-ice" (You can also transfer it to the food processor & pulse until smooth). Return the mixture to the container, cover, and freeze until solid. The goal is to get the creamiest consistency possible.
When you’re ready to eat, take the nice cream out and let it soften at room temperature for 5 to 10 minutes before scooping. Spoon into bowls, top as desired, and enjoy.