In a medium bowl, mash the avocado flesh with the vinegar, salt and pepper until smooth. Season to taste with additional salt and/or pepper, if desired.
Cut the pita pockets in half.
Stuff the pita pockets with the lettuce leaves and basil.
Evenly divide the avocado mixture between the pita pockets, spreading it on the lettuce leaves.
Add 2 tomato slices to each pocket. Devour.
Recipe by Go Dairy Free at https://www.godairyfree.org/recipes/avocado-lettuce-tomato-pitas