Pickled Oyster Mushrooms and Pearl Onions | RICARDO

Ingredients

• 1 bag (284 g/10 oz) pearl onions, peeled
• 1/4 cup (60 ml) olive oil
• 1/2 lb (225 g) oyster mushrooms, sliced
• 1/4 lb (115 g) brown mushrooms, cut into quarters
• 1 teaspoon (5 ml) mustard seeds
• 1 teaspoon (5 ml) coriander seeds
• 1 teaspoon (5 ml) fresh rosemary leaves
• 1/4 cup (60 ml) balsamic vinegar
• Salt and pepper