Cut the pork into 2cm cubes. In a large bowl, mix the olive oil, lemon zest and juice, garlic, paprikas, coriander, fennel and plenty of salt and ground black pepper. Add the pork and stir until evenly coated. Cover and marinate in the fridge for at least 2 hours or overnight if preferred. Preheat the grill to high. Cut the peppers into 2cm cubes. Line the grill rack with foil then place the marinated pork cubes on the foil along with the cubes of pepper. Grill for 10-15mins, turning the cubes until they are lightly charred.
Spike a piece of each pepper and a piece of pork onto a cocktail stick and arrange on a platter or for a more informal occasion, transfer the mixture to a serving bowl and serve with cocktail sticks for people to help themselves.
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