This article is from the Solid Food for Infants FAQ, by David M. Poduska firstname.lastname@example.org with numerous contributions by others.
Buy one pound of well-trimmed stew beef (I bought "all-natural" stuff
from the health food store); brown a little bit in a non-stick pan, then
add a cup of water and cook gently until soft enough to cut with a wooden
spoon--about two hours. Treat as above, but then be sure to mix with
something cohesive such as brown rice cereal (which I prepare with
mother's milk) or with mushed peas--the meat is a little hard to swallow,
straight. Makes enough for one tray plus a little bowl to keep unfrozen.