Place strawberries, lemon juice, honey, vanilla and salt in a medium saucepan.
Use a potato masher to break the strawberries into smaller pieces so that they release their juices. I like chunky sauce and they tend to break down on their own as they cook, so I only mash a little at the beginning and then more if needed toward the end.
Bring mixture to a boil and then reduce to low/medium heat and simmer.
Simmer for 10 minutes, stirring often.
While the strawberry mixture is simmering, mix together the tapioca starch and water to make a slurry.
Once the mixture has simmered for 10 minutes, stir the slurry well and then pour it in. Allow everything to continue simmering for 1-1.5 minutes to thicken the sauce. Break the strawberries into smaller pieces with the potato masher if desired.
Once it has thickened somewhat, remove it from heat. Use a spoon to scoop out some of the sauce and allow it to cool. Taste and add more honey if desired.
Serve warm or room temperature. It will continue to thicken as it cools. Store in a sealed container in the fridge.