The Los Angeles Lakers superstar usually has family dinner on Tuesdays with his wife, Savannah, and kids -- but this time, he made some room for his new 6'10" superstar teammate. 

And, if you think AD got out of screaming out "Taco Tuuuesday" like the rest of the fam ... you're wrong!"

In fact, Bron is such a Taco Tuesday superfan, he wore a brand new "Taco Tuesday" t-shirt to dinner ... which is like wearing a shirt of your favorite band to your favorite band's concert.

Weird, never saw Lonzo Ball, Brandon Ingram or Josh Hart at Taco Tuesday ... and now it seems like we never will!

Bron and Davis have been growing close ever since he signed with the Lakers -- we even spotted the two shooting around on the set of "Space Jam 2" earlier this summer.