You can! If you want to make lychee boba with real lychees, peel and remove the pits of a handful of lychees (8 to 10). Blend the lychees to make a puree and strain the juices if you don't want the chunks. I don't mind the texture since they go well with the tapioca. Blend the pureed lychee (or its juices) with the milk and combine with the brown sugar tapioca.