Wash and dry cucumbers and peel shallot.
Cut cucumber in half long way, place flat sides down, and cut into 1/2 inch pieces.
Dice shallot.
Put cucumber and diced shallot into a medium bowl.
Slice avocado into bite-sized chunks and add to bowl with the cucumber and shallot.
Add feta, dill, and Greek dressing to bowl with the cucumber, shallot, and avocado.
Mix ingredients.
Season with salt and pepper to taste.
Enjoy!