I'm a dietitian on the Mediterranean diet. Here are 12 things I'm buying at Costco this spring.

Lauren Manaker

• I'm a dietitian on the Mediterranean diet, and I love shopping at Costco in the spring.
• I make sure to stock up on staples like Dave's Killer Bread, olive oil, and low-sugar granola. 
• Burrata, avocados, grapes, and pistachios are also always in my cart when the weather warms up.

I've been following a Mediterranean-style diet for as long as I can remember, thanks to the combination...