How do you fix a broken dishwasher mounting bracket?

If you are talking about the bracket that mounts the dishwasher to the underside of the counter top to prevent it from "walking out", I have found that the EZ Bracket is the best answer. It is available at Stone Tool Distributors like Braxton-Bragg.

The website is
http://www.braxton-bragg.com/index.cfm/m/3/fuseaction/store7catalog.level/bc/0,8459,8977/

The thing that I like is that you can use it either before or after the counter top is in place and it works on Granite, Formica or other counter top materials. It is inexpensive and easy to use.

You do not have to drill into the granite, which is a relief.