1 To make the pesto, crush the garlic to a paste with a pinch of salt using a pestle and mortar. Add the pine nuts and pound to a coarse paste, then tear in the basil and mint, pounding again until they’ve broken down. Stir in the oil and cheese, then taste for seasoning – add more cheese if you prefer.
2 To make the risotto, heat the oil and butter in a large non-stick frying pan over a medium heat. Add the courgettes, sprinkle in the chilli flakes and nutmeg and season with salt and pepper. Fry for 3-5 mins until the courgettes are golden and softened. Add the spring onions and lemon zest, and stir for a minute or two. Tip in the rice and stir to coat in the oil until translucent, about 2 mins.
3 Pour in the wine, then cook for a couple of minutes until it’s mostly evaporated. Add a ladleful of the stock and stir for a few minutes until it’s absorbed. Continue adding a ladleful at a time for 20-30 mins, stirring continually, until all of the stock is absorbed.
4 Stir in the blanched broad beans and flowers, if using, and warm through for 2 mins. Remove from the heat and stir through the parmesan. Allow to sit for about 5 mins, then swirl through half of the pesto.
Any remaining pesto will keep chilled for up to two days.
5 Divide the risotto between bowls and scatter with the extra basil leaves, extra cheese and another spoonful of the pesto, if you like.