Context:
I am talking to my friends, trying to find out what she wants to eat tonight.
"What do you want to eat tonight?"
"You know what I want to eat."
"If I knew what you wanted to eat, I wouldn't be asking you what you wanted to eat."
I am wondering about "wanted" and "wanted" should they be in the present tense? Maybe this is better:
"If I knew what you want to eat, I wouldn't be asking you what you want to eat."