Next is the perennial, burger-topping iceberg lettuce. You'll need 33 cups of ... This pretty red and green leaf is chard. And it's a powerhouse. We're talking 300% of your daily vitamin K.

Instead, consider something with a big, flat leaf, such as iceberg, butter lettuce, red or green leaf lettuce, or even a nutrient-rich romaine. Using one of these delicious greens will not only ...