I don't have the luxury of being home to do the reasch in privacy.
I said it in previous post. WHAT, WHO, WHERE etc are equal relative nouns. If you agree and insist that "what" is a relative pronoun, then we should treat WHO and WHERE, the same.
By the same token, then my sentence is valid.
So if you dont mind, what would you say the right answers are to these statement:
Garlic and onion are what [makes]/ [make] the beef taste so good.
Garlic and onion are the two ingredients that [make] / [makes] the beef taste so good.
Onions [are] / [is] what gives/ give the soup that rich flavor.
Thank you for you replies!