
Hi,
I would start weaning by offering her (from your fingers) about a teaspoonful of scraped raw beef (not minced - that can be too stringy) once a day. That should be enough for the first couple of days, then you can offer the same thing twice a day for a couple of days. Then I would add some thoroughly soaked and mashed good-quality puppy food, just a tiny bit, as well.
:)