Brush both sides of the cauliflower with oil, season with salt. Grill the cauliflower over/on a medium heat (approx. 180 °C for approx. 10 mins. on each side.
Combine the lemon juice, oil, tahini and garlic, season. Mix in the apricots and sesame seeds.
Mix the yoghurt and coriander, season with salt.
Drizzle the dressing over the cauliflower, top with the herb yoghurt and tomatoes.