Tortillas are uber-cheap. In fact, it's not uncommon to pay less than $3 or $4 for a dozen or more, and a sizeable bag of shredded cheese should cost you less than $4. These are the only two ingredients you need to make delicious and filling quesadillas. Since both contain multiple (in the case of tortillas, even dozens) of servings, you can dress your quesadillas up and still stay safely under the $2-per-person mark. For example, if you want to add more flavor, try this easy quesadilla recipe.