Place the dates and warm water (if necessary) in a food processor, and pulse until they form a doughy paste.
Add the nuts, and pulse until they are broken into small pieces. Use a rubber spatula or spoon to break up the mixture if it clumps together.
Add the lemon juice & sea salt, and give it a final pulse to mix.
Transfer the mixture to a large Ziploc bag, and refrigerate until firm.
Roll the mixture out on a cutting board and shape as desired. Try rolling into bite-sized balls or slicing into rectangle bars. Cookie cutters are fun too!
Wrap in plastic wrap & store in the fridge :)