Chop the onion, garlic and bell pepper into small pieces. Put the other ingredients except the meat in a mixing bowl and mix well with a hand blender. Cut the chicken breast fillets into thin strips and put them on the wooden skewers. Tip: Dip the wooden skewers in oil before opening them. Finally, put the skewers in the marinade and let stand for 2 - 3 hours. The skewers taste best from the grill.