Eating out while on a diet can be difficult, as many restaurants have high-calorie foods.More restaurants have lately been offering a wider variety of low-calorie, diet-friendly options.From Starbucks' spinach-feta wrap to The Cheesecake Factory's Mexican lettuce wraps, here are 45 dishes under 500 calories.If you're trying to watch your calories, you might think going out to eat is off limits.Many restaurants pack their food with extra fat, sugar, and sodiuma single entree in a standard American eatery can contain enough butter, sauce, toppings, and sides to be considered two meals in one. This can make it seem impossible to go out for dinner without throwing your diet out the window.But with the increasing public demand for healthier food options, many restaurants now offer a variety of low-calorie options. You just have to know what to order.Though calories aren't everything when it comes to eating healthy, having options can certainly make dining out a lot easier for people who do want to cut back on their caloric intake or lose weight.So if you're currently on a diet, or just looking to be more mindful of what you're eating, here are 45 under-500-calorie options from your favorite chain restaurants:Order a Chipotle salad bowl with chicken, salsa, pinto beans, fajita veggies, and cheese, and you're looking at 460 calories.Chipotle gets the No. 1 spot on this list because it's the one of the easiest places to customize your meal. There are many combinations Chipotle offers that are under 500 calories.Starbucks' spinach, feta, and cage-free-egg-white wrap is only 290 calories.Honorable mentions are the turkey bacon sandwich (230 calories), which features egg whites and a whole wheat English muffin, and the newly added sous-vide egg bites (310 calories for two).Dunkin Donuts' turkey sausage sandwich is only 450 calories.Doughnuts aren't the only food this chain has to offer. This sandwich is only one of several breakfast options that are under 500 calories.See the rest of the story at Business Insider Click here to read full news..