Heat butter and oil in pan and sauté onions & garlic until soft.
Add a dash of salt to season then the red wine. Simmer until liquid is reduced by half, then add Sorrel Chutney and simmer for 5 more minutes.
Add orange zest just before removing from heat.
Heat oil in grill pan and brown the chicken, about 3 minutes on each side, until cooked through. Serve chicken immediately with the sorrel relish.
Serve as an entrée or this chicken & relish also makes a great wrap or pita sandwich