Marinated Portabello Mushroom

Ingredients

• 4 pcs. (3 oz or 85 g) portabello mushrooms
• 1 (1.5 oz or 40 g) shallot, finely chopped
• 1 teaspoon (3 g) garlic, minced
• 2 tablespoons (1 fl oz or 30 ml) olive oil
• 2 tablespoons (1 fl oz or 30 ml) balsamic vinegar
• Kosher salt and freshly ground black pepper