Loukoumades are Greek balls of fried dough covered in honey or syrup and cinnamon. Nowadays, there are many different variations and you can order these with Nutella, pistachio, and different sweets on top. Sometimes I like to get mine with ice cream as well. They’re perfect for sharing, and kids love them!
I just stumbled upon a great souvlaki restaurant that had mushrooms instead of meat! It's called Street Souvlaki (Κατάστημα Ακτή Μιαούλη) in Pireas, if you're passing by, definitely check it out. This is a great option for tourists that are vegan. You can also find recipes to make it at home, but it tasted so good that I imagine it might be hard to replicate. Here is a link to one that I think will taste the same.
Shrimp dolmadakia are a lesser known dish that is made locally in the Ionian islands. The flavor is very similar to those made with beef since they both use tomato sauce and aromatic herbs. The only difference is that there is a strong seafood taste, as they are cooked in a seafood broth. These ones here are made in an abstract shape and topped with lemon sauce. It’s a super unique dish that I definitely recommend you try if you ever see these on the menu.
There are so many Greek snacks that you could bring on your trips and road trips this summer! The first one that I recommend is spanakopita of course. This is a classic and will never disappoint. Other types of pitas are great as well such as tiropita and kreatopita. For sweet snacks I recommend pasteli, papadopoulos cookies and rice pudding. You can buy all of these on the go in Greece if you're on a road trip in Crete or on the mainland and you can also make them at home to bring along.