I'm 22 and highly active as well (I play basketball), so I get all of my food wholesale at Costco which saves me hundreds of dollars a month on food.
I have recently published a book on Amazon Kindle that contains 30 Slow Carb Recipes and each recipe can be made in under 30 minutes. (The book is FREE for a limited time) I assure you that the recipes that you find in the book will fill you up, and are easy to make.
Here's the link: http://www.amazon.com/dp/B00MPFAB20
Let me know if you find it helpful!