Onions and blueberries jam | Sauce, dip and broth recipe

Ingredients

• 15 ml (1 tablespoon) of butter
• 1 mid-size red onion, finely sliced
• 250 ml (1 cup) of frozen blueberries (as small as possible)
• 125 ml (1/2 cup) of white wine
• 125 ml (1/2 cup) of sugar
• 1 Bay leaf
• 1 pinch of thyme
• 1 pinch of rosemary
• Salt and pepper