Serve immediately, or cover and chill until ready to use.
Notes
Grapes: Feel free to use red or green grapes or a combination of the two.
Greek yogurt: You can use 0%, 2% or full-fat Greek yogurt. Sour cream (full-fat or lite) can also be used. I don't recommend using fat-free sour cream.
Cream cheese: Full-fat, reduced-fat, or Greek yogurt-style cream cheese will work. I don't recommend using fat-free.