Each week we round up our favorite posts and recipes from our friends at The Kitchn.

This week, the Kitchn shares five tips to make your fridge more efficient. Ever vacuumed behind it? It gets a little scary back there.

Also on the Kitchn:

• Colorful Lentil Salad with Walnuts & Herbs:This make-ahead lunch is easy, healthy, and filling, and the sweet, tangy dressing pulls it all together.
• Why Your Co-Worker's Smelly Lunch Makes You Feel Bad: According to Pamela Dalton, an olfactory researcher at the Monell Chemical Senses Center, bad smells trigger bad moods.
• My Celery Dilemma : It usually functions like a member of the back-up band and, like a rhythm guitar, it's nice but not always essential.
• Peanut Butter & Jelly Icebox Cookies: Because the only thing better than a PB&J sandwich is a PB&J cookie.