What is a star shaped blue herb called?

The star shaped herb you're referring to is likely Borage, also known as Starflower. It's a beautiful, edible flower that produces star-shaped, vibrant blue flowers. Borage is often used in salads, garnishes, and herbal teas due to its mild cucumber-like flavor. It's also known for its purported medicinal properties and has been traditionally used for its soothing and calming effects.