Wash and cut the tomatoes and onion in half, and the carrot into strips. Keep the garlic whole.
Preheat the air fryer to 180°C (356°F) for 2 minutes.
Air fry the tomatoes, carrot, onion, and whole garlic at 180°C (356°F) for 15 minutes, until soft.
Let the roasted veggies cool a little.
Squeeze out the tomato and garlic pulp. Blend the tomatoes, garlic, carrot, onion, and a little water into a smooth paste.
Melt the butter in a pan, add the paste, and cook on low for 3 minutes, stirring.
When it thickens, add ½ cup water, stir, and bring to a boil.
Add salt, black pepper, and mixed herbs. Cook on low for 2 to 3 minutes until smooth.
Pour into bowls, swirl cream on top, and serve hot.