Look over black families that trace back to at least one person who would have been eligible for New Deal and Post War housing benefits but did not receive them due to the colour of their skin or for living in a redlined neighborhood or other factors of the like, calculate an average benefit to each generation following from Americans who did get those benefits, and pay out accordingly to modern black and mixed race households.

It is debatable if there's even money that could be paid back for slavery since those wages arguably may have already exhausted their extragenerational benefit, but redlining and housing benefits denial is a crime we can observe clearly in the present day, and who's generational benefits are well argued to be still in hand for the families that did get them.