Step 1

Preheat the oven to 220C/200C Fan/Gas

Step 2

Tip the potatoes into a baking tray and drizzle with the olive oil. Season with a pinch of salt, then roast for 15 minutes.

Step 3

Meanwhile, whisk a glug of olive oil with the vinegar, oregano and garlic in a large bowl. Add the radishes, onion, pepper and halloumi, season with salt and pepper and mix together.

Step 4

Add the vegetables and halloumi to the potatoes, stirring to combine. Return to the oven for a further 25 minutes, until everything is soft and starting to crisp at the edges.

Step 5

To make the tzatziki, put the squeezed out cucumber in a bowl with the yoghurt, garlic and mint. Season to taste and stir to combine. Drizzle with a little olive oil.

Step 6

To serve, pile the traybake onto 2 plates with tzatziki on the side.