Bring milk to a light boil over cooking over medium-high heat. Stir frequently from the bottom of the pot to avoid creating a film.
Remove milk from heat, cover, and let it rest until it reaches 115-120 degrees F.
Stir in yogurt. Cover with lid, and wrap the pot in a heavy towel. Let it rest for 24 hours at room temperature.
Once the texture is yogurt, add salt and stir well.
If you finish the process here, you'll have yogurt. Refrigerate it in an air-tight container.
To continue with labneh, pour yogurt into a cheesecloth or paper towel-lined strainer that sits in a large bowl. Cover yogurt with the paper towel/cheesecloth. Rest in fridge for 24 hours.
Be sure to pour out the liquid that accumulates every so often to avoid it seeping back into the yogurt.
After 1 day, your labneh will be ready to store in an air tight container in the fridge.
Tip: Garnish with olive oil, mint leaves, za'tar, and eat with your choice of vegetables, bread, or olives.