Heat oil in a skillet over high heat. Add onion, garlic, and clams. Cook for 1 minute to sweat the onions. Add wine and bring to a simmer. Add sun-dried and diced tomatoes, oregano, rosemary, basil, and cilantro. Stir in syrup, pepper, and nutmeg; season with salt. Cover and simmer until clams have opened, about 5 minutes. Discard any unopened shells. Top with basil and serve as is or with your favorite pasta.