Shredded Chicken, Chard And Chickpea Soup

Ingredients

• 2 tablespoons olive oil
• 1 medium onion, sliced fine (about 1 Âź cups)
• kosher salt and freshly ground black pepper
• 1 medium clove garlic, minced (about 1 teaspoon)
• 1 bunch chard, ribs removed and cut into 2-inch ribbons (about 4 to 5 cups)
• 1 (15 ounce) can of chickpeas, drained and rinsed
• 1 ½ pounds chicken breast (about 3 medium breasts)
• 4 cups homemade or store-bought low sodium chicken broth
• 1 piece parmesan rind (optional)
• 2 tablespoons lemon juice from 1 lemon
• parmigiano-reggiano, for grating