Brocho before eating this: Borei Pri Ha'adama
[if the vegetables are completely ground (puree) the correct Brocho is Shehakol Niyeh Bedvoro]
[if matzo meal was added for taste, the Brochos would be different]
Brocho after eating the proper shiur of this: Borei Nefashos
Source: The Laws of B'rachos (page 384)