Begin by preparing the squid. Carefully remove the tentacles and set aside. Ensure the bodies are fully cleaned, with the cartilage and innards removed.
In a large pan, heat half of the olive oil over medium heat. Sauté the chopped onion and garlic until translucent, about 5 minutes.
Chop the reserved tentacles and add them to the pan along with the pine nuts and currants. Cook for an additional 3-4 minutes, stirring frequently.
Add the uncooked rice to the pan and stir to coat with the oil and flavors. Cook for 2 minutes.
Pour in the lemon juice, half of the white wine, and enough fish stock or water to just cover the rice. Season with salt, pepper, and dried oregano. Bring to a simmer, cover, and cook until the rice is half-cooked, about 10 minutes.
Remove the pan from the heat and stir in the fresh parsley, dill, and mint. Allow the mixture to cool slightly.
Preheat your oven to 375°F (190°C).
Stuff each squid body with the rice mixture, filling them about three-quarters full to allow rice to expand. Close the openings with toothpicks.
Place the stuffed squid in a baking dish. Drizzle with the remaining olive oil and the rest of the white wine.
Bake in the preheated oven for 30 minutes, or until the squid is tender and the rice is fully cooked.
Serve the stuffed squid with a drizzle of the cooking juices from the baking dish.