We love a kale Caesar for lunch as much as the next person...until it rings up to a cool 15 bucks. Yep, your bank account is basically begging you to bring your own lunch. But we're not talking peanut butter and jelly. All it takes to make fabulous weekly lunches is a little planning and some Sunday cooking to become your office's brown bag queen. Here, 21 easy meal-prep lunch recipes to get you started.