Place the hazelnuts in a skillet on a medium heat and toast until golden. Remove from the pan and set aside. Once cooled, gently crush into large chunks in a mortar and pestle, alternatively chop into chunks.
Pat the chicken fillets dry with a paper towel. Cut each fillet horizontally into two flatter fillets. Season with salt, pepper and a sprinkle of your Italian spice mix.
Place the skillet back on a medium to high heat. Once warm, drizzle in some olive oil and brown the chicken fillets on each side. Remove from the pan to rest.
Add the green beans to the hot skillet with a drizzle of olive oil. Fry until starting to char slightly. Add a few tablespoons of water and ½ tsp salt and cover to steam for a few minutes until bright green and tender. Remove from the pan and toss with the crushed hazelnuts and crumbled feta. Season to taste.
Return the pan to a medium heat. Add the garlic, capers, 1 ½ tbsp Italian spice mix and 1 tbsp olive oil. Finely chop the coriander/parsley stems and add the the pan. Sauté until fragrant. Roughly chop the coriander leaves and set aside.
Add the wine and allow to reduce on low heat for 5 minutes. Stir in the lemon juice and ½ tsp honey and simmer for another 5 minutes. Stir through the chopped fresh coriander (set some aside for serving). Season to taste.
Plate up the sweet potato mash. Place the chicken fillets on top and pour over the piccata sauce. Serve the hazelnut and feta green beans on the side. Garnish with fresh chopped coriander and enjoy!