Lowest calories fast food.

Subway veggie delight salad. 

Without the dressing, it's only 50 calories. I think this is the lowest calories fast food I can find. 

Without the dressing, the salad wouldn't be tasty. The lowest dressing I found is a mustard, 10 calories. However, mustard with salad isn't enough for dressing. 

I think, sweet onion and teriyaki would pair well with the salad. It's 35 calories and my favourite condiment from subway. 

Veggie delight salad with the sweet onion teriyaki is total of 85 calories.