What if we thought of our dinner plates the same way we think of little white pills? This week we speak to author Gary Wenk, who makes the case that there is little difference between food and drugs, since everything we consume can have an effect on how we think and feel. We'll taste lemonade, and we’ll speak with food writer Adam Gopnik. Then we’ll head into the test kitchen to learn the best way to roast potatoes. And of course, we’ll be taking your calls to answer all of your cooking questions.