[USER (data scientist)]: Cool, thanks! Now, I need a function to figure out which category a food item belongs to based on its name. Please generate a DataFrame by reading and categorizing items in the 'fastfood.csv' dataset into predefined categories using the 'categorize_food' function. 
 My template of code snippet is:

---BEGIN CODE TEMPLATE--- 

import pandas as pd
import pickle

# Read the fastfood data 
fastfood = pd.read_csv("fastfood.csv")  

# YOUR SOLUTION BEGIN:
<code1>
[GENERATE YOUR CODE]
</code1>
# YOUR SOLUTION END: 

---END CODE TEMPLATE---

[YOU (AI assistant)]: Sure thing! Here's a function that takes a food item name and returns the category it belongs to: 

