These Low Calorie Lettuce Wrap Tacos are just 37 calories each! They are small, so you will absolutely want more than just 1. A good serving side is 8 tacos for 296 calories.Special Tip: I like to save the leftovers for a lunch salad. I add the leftover lettuce leaves to a meal prep container and rip them a little into bite sides pieces. Then I top with leftover taco meat and toppings and pop into the fridge. Then I have the perfect easy lunch for the next day.