Which dish from Panda Express contains peanuts?

Kung Pao Chicken is the correct choice as it is traditionally known for including peanuts as one of its key ingredients. The dish is a combination of diced chicken that is stir-fried with vegetables, chili peppers, and often features roasted peanuts which add a distinct crunch and flavor to the dish. This combination not only enhances the texture but also provides a nutty taste that is vital to the overall profile of Kung Pao Chicken.

In contrast, the other options do not typically include peanuts as an ingredient. Beef and Broccoli focuses on the combination of beef and broccoli in a savory sauce, Orange Chicken features battered and fried chicken in a sweet orange sauce, and Sweet and Sour Pork combines pork with a tangy sauce without the addition of peanuts.