Dear ____________,
I had a fantastic time at your family’s 4th of July BBQ. The company was great as usual, and the food was incredibly delicious! I think I’m now addicted to sliders and potato salad. It was also fun lighting up sparklers and firecrackers in front of your house. It’s just too bad that a corner of your grass ended up getting scorched by your neighbor. We’ll need to pull out the full length of the hose next time.
A big thanks to you and your family for a wonderful evening!
(YOUR NAME HERE)