Make the Greek herb vinaigrette by combining olive oil, red wine vinegar, garlic, lemon, spices, and parsley. Taste and adjust seasoning. Set aside.
Drizzle olive oil over tentacles, then sprinkle generously with salt and pepper.
Preheat grill or grill pan to medium-high. Grill tentacles for 3-5 minutes until charred and heated through. Grill potatoes or vegetables if desired. Grill halved lemons for serving.
Transfer grilled tentacles to a serving dish and drizzle with vinaigrette. Serve with grilled potatoes and lemon wedges.
Prep Time: 10 minutes
Cook Time: 10 minutes
Total Time: 20 minutes
Servings: 3-4