For this recipe, I used an 8oz carton of sliced button mushrooms and an 8oz carton of creminis. You definitely need to sautee the spinach in batches. It looks like a ton, but it's really not. The spinach comes out flavorful, but not overly flavorful. I also felt that it needed a pinch or 2 of salt at the end. This recipe isn't earth shattering, but it was tasty and a nice mild side item for dinner!
Source: Quick Fix Meals with Robin Miller (Food Network)
Yield: 4 to 6 servings