yellow chard recipe

Ingredients: 1 bunch yellow chard (also known as golden chard), stems and leaves separated 2 tablespoons olive oil 1 large onion, thinly sliced 3 cloves garlic, minced 1/4 teaspoon red pepper flakes (optional) 1/4 cup vegetable broth or water Salt and freshly ground black pepper to taste Juice of 1 lemon Freshly grated Parmesan cheese (optional, for garnish)