I'm obsessed with this simple yet genius meal prep hack from the incomparable Queen of Clean Eating Allison Tibbs. Using mason jars you can pick up on Amazon or any kitchen supply store you can prep delicious salads and grain bowls that will last for several days without getting your veggies soggy using Allison's layering technique. Seriously, letting these suckers "marinade" in your favorite dressing and ingredients makes these salads tastier AND healthier than any quick serve salad joint and are easy to throw together.