Toss swordfish with juice of one lemon, oregano and 1 tablespoon olive oil. Let sit for 20 minutes.
Skewer on to skewers (if wooden, soak for at least an hour before). Season with salt and pepper.
Skewer tomatoes onto skewers
Grill tomatoes and swordfish until charred and cooked through, about 2-3 minutes.
While the fish and tomatoes are grilling, make the sauce. Heat the olive oil over a medium heat, add garlic. Cook until fragrant and soft, about two minutes. Remove from heat and add lemon. Season with salt and pepper.
Once fish is done cooking, drizzle with lemon and garlic.