Oh, this one is so good and easy I just had to post about it! I googled 'vegan cream of broccoli' and from the wonderful options that resulted, I made this tasty bowl.
1 bag frozen broc/cauli mix
1 onion (rough chop)
2t chopped garlic
splash of olive oil
italian spices (or whatever spices you want)
Microwave the cauli/broc until it's done. While this is steaming, sautee the chopped onion in the oil until translucent. Add the garlic, stir it up a bit, remove from heat. Pour the cooked cauli/broc into the blender. Add the onion/garlic. Salt generously, pepper to taste, add spices. Add enough water to almost cover the mixture (tweak this amount to suit your preference of creaminess). Blend. Enjoy.