In a large pan over medium heat, melt butter. The zucchini potato recipe takes minutes to put together which is especially handy during holidays when you need to prepare lots of food but don’t wish to spend the whole day in the kitchen. Put the olive oil in a large, lidded frying pan. Add the courgettes and herbs and season with salt and pepper. Add garlic and cook until fragrant, about 1 minute. Method. Bring a large saucepan of water to the boil. Drizzle with olive oil and set to cook for 12 minutes. Add milk mixture, chopped garlic and basil to the ActiFry and set to cook for a further 4 minutes. For this recipe I used 5 smaller potatoes and about 1 ½ zucchini. Instructions. How To Make Potato Zucchini Gratin. Meanwhile, combine cornstarch and milk together. After 4 minutes, check and season to taste. Preheat the oven to 200C/Fan 180C/Gas 6. Zucchini Gratin Recipe : Add chopped onion, chopped zucchini, salt, pepper and nutmeg to the ActiFry. Preheat oven to 190°C (170ºC fan) and butter a medium casserole dish. Add in the Brussels sprouts, leeks and cabbage, bring back to the boil and cook for 4-5 minutes.