Asparagus Gremolata - Check out Ina's recipe for Green Beans Gremolata but do it with asparagus
You're going to need some color. I was going to say mix in some roasted cherry tomatoes too, but looks like someone doesn't like/is allergic to tomatoes. If it's just doesn't like, they can get some asparagus without the tomatoes.
Not very pretty, but good - creamed spinach
Asparagus Goldenrod is pretty, colorful, and simple. It's kind of an old-timey thing. If your dad will be there, he might get a kick out of that.