Roasted chickpea and mushroom soup

Ingredients

• 3 cups chicken broth
• 1 cup canned chickpeas
• 5 ounces. mushrooms (about 7 mushrooms), whole
• 1 garlic clove, chopped
• 1/4 onion, cut in big slices
• juice of 1/2 lemon
• 2 tablespoons. olive oil
• 1 carrot, finely diced
• 1 stalk celery, finely diced
• 1/2 cup pea shoots, diced
• 1 tablespoon. finely diced fresh parsley