Beautiful little spheres!
We agree that they are beautiful.
What you have there are slug eggs.
Here is our page on slugs and snails: https://extension.umd.edu/hgic/slugs-and-snails
If you are on Facebook, 'like' the Home and Garden Information Center page. We recently shared a photo very similar to yours.
Thanks for the id. Last week I saw 2 slugs hanging from a maple tree one above the other on a foot long slimy string. They are creepy animals but I leave them in peace.
Slugs in love....