Liver with Caramelized Onions

Ingredients

• 30 ml (2 tbsp) butter
• 1 large red onion, sliced thinly
• 5 ml (1 tsp) sugar
• 565 g (1 1/4 lb) calf’s liver, in thin strips
• Salt
• freshly ground pepper
• 60 ml (4 tbsp) flour
• 45 ml (3 tbsp) extra-virgin olive oil
• 30 ml (2 tbsp) balsamic vinegar
• 30 ml (2 tbsp) white wine
• 5 ml (1 tsp) fresh sage, chopped
• 5 ml (1 tsp) fresh parsley, chopped