Red Onion Spinach

3 tbsp. extra-virgin olive oil
1 large red onion, sliced
¼ cup reduced sodium chicken broth
1 tbsp. soy sauce
¼ tsp crushed red pepper flakes
¼ tsp salt
½ tsp freshly ground black pepper
20 oz. pre-washed fresh spinach (about 10 cups)
¼ cup shredded Parmesan cheese

Heat oil in large skillet. Add onion and cook about 8 minutes or until tender. Add broth, soy sauce, red pepper flakes, salt, and pepper. Add about one third of the spinach and cook until it begins to wilt, about two minutes. Continue adding the spinach one large handful at a time, sautéing just until it begins to wilt before adding more. Transfer to a bowl, top with cheese, and serve.

Taken from Giada de Laurentiis' Everyday Pasta cookbook. This is one of my favorite ways to do spinach.