Peel onion and cut into fine rings. Mix honey, lemon juice and olive oil together. Season with salt and pepper. Quarter the peppers, clean and wash them and place them on a baking tray with the skin side up.
Roast under the preheated grill until the skin turns black, remove, cover with a damp cloth and leave to steam for about 10 minutes. Peel the peppers and mix with the vinaigrette.
Wash the meat, dab dry and cut into 4 equal pieces, season with salt and pepper. Coat a grill pan with oil and fry the meat on both sides for 5-6 minutes. Wash parsley, shake dry and pluck leaves from the stalks.
Arrange the paprika vegetables on plates and serve with the turkey filet, garnish with parsley.