A large variety of foods has significant vitamin B3 content so following a balanced diet you can easily cover your daily needs. Basically, all kinds of meat and offal, or almonds and dried apricots, consumed in smaller amounts are excellent vitamin B3 sources. 

Sauté the onions on a little fat. Mix the onions, the cubed liver, eggs, oat flakes, herbs salt and pepper in a bowl. Lay out the chicken thighs, cover them with baking paper or cling film and beat them out thin. Place them in a pan lined with baking paper, add salt and fill them with 1-2 spoonfuls of liver stuffing, fold them and fasten them with a toothpick. Preheat oven to 170 °C and roast for 25-30 minutes. Serve with fresh salad mix, olives, vegetables, avocados.