Salads are one of the healthiest lunch ideas, right? Well, mostly right. While salads are a great source of antioxidant-rich veggies, essential micronutrients, and fiber, they can also be made to be nearly as unhealthy as a fast-food burger depending on which salad dressing you choose to drizzle on top. In fact, some of the worst restaurant salads can contain upwards of 2,000 calories and 30 grams of saturated fat—that's over 150% of your daily value! (Related: 25 Unhealthiest Restaurant Salads in America.) But don't be…