Make the meatball mixture. Add the ground chicken, ⅓ cup of grated parmesan cheese, ⅓ cup chopped sundried tomatoes, crushed garlic, 2 teaspoons of dried thyme, 1 teaspoon of salt, the chopped basil leaves, a good grind of black pepper, the egg, and ⅓ cup of panko breadcrumbs to a mixing bowl. Use your hands or a large spoon to mix well to combine, ensuring the seasoning is evenly dispersed.
Form the meatballs. Line a plate or tray with parchment paper. Lightly wet your hands (this will stop the mixture from sticking to them), then scoop up a heaped tablespoon of the mixture. Roll into a ball, roughly the size of a golf ball, and set on your prepared plate or tray. Repeat with the rest of the mixture. PRO TIP: If you have time, I recommend popping the meatballs in the fridge for about 30 minutes before cooking them - this will help them keep their shape in the pan.
Brown the meatballs. Set a large, high-sided skillet or pan over medium-high heat and add 1 tablespoon of the sundried tomato oil. Add the meatballs and cook for a couple of minutes on each side, until lovely and golden all over. You don't need to cook them all the way through at this point - they'll simmer in the sauce later. This is to seal them and build flavor. Remove the meatballs from the pan and set aside on a plate for now.
Make the creamy sauce. If needed, remove any burnt bits from the pan. Then add the crushed garlic, ½ teaspoon of salt, and ½ cup of chopped sundried tomatoes. Cook, stirring for a couple of minutes, then add the tomato paste and stir for another minute.
Add the coconut milk and seasoning. Add ½ cup of chicken stock, 1 teaspoon of fish sauce, 1 teaspoon of dried thyme, 1 teaspoon of chili flakes (if you're using them), 2 teaspoons of lemon juice, 1 cup of coconut milk, and ½ cup of shredded Parmesan cheese. Stir and bring to a simmer.
Simmer the sauce. Once the sauce is simmering, reduce the heat and leave to cook for 5 minutes. At this point, add the meatballs into the sauce, stir, and simmer for another 10 minutes.
Garnish and serve.To finish, spoon more sauce over the meatballs and scatter with the basil leaves. Serve with steamed rice or baked rice, fresh bread, over mashed potatoes or pasta.