Fast food used to be the obvious choice when you wanted to spend as little as possible on a meal away from home. That calculation has become harder as combo meals, premium sandwiches and add-ons push quick-service restaurant bills higher. Meanwhile, some sit-down restaurants have introduced lunch specials, early-week promotions and other value offers that can make a full-service meal surprisingly competitive. The trick is knowing where to look and understanding which deals actually include enough food to replace a fast-food run. For budget-conscious diners, these seven options are worth checking before automatically heading to the drive-thru.