Roasted fennel with cherry tomatoes, za'atar and greek yoghurt

Ingredients

• 1 head of fennel
• 200g vine on cherry tomatoes
• za’atar
• olive oil
• 200g Greek yoghurt
• 1 tablespoon dried thyme- crushed (or sub oregano)
• 1 tablespoon cumin
• 1 tablespoon coriander (dried)
• 1 tablespoon of toasted sesame
• 1 tablespoon sumac
• 1/4 teaspoon salt
• 1/4 teaspoon chilli flakes