Bear in mind, 2 bananas are quite impactful on the nutritional content of a meal. Try less, like 1 or 1/2 a banana. It should be enough to give it some taste still.
Are you on vanilla or unflavoured?
As suggested, here are a couple of places where different flavours have been discussed:
I personally like the Vanilla Huel if well shaken and left to sit for a while (1-2 hours). With the unflavoured one I use stock cubes or spices (like the recent one from Lidl’s Polish week http://leaflet007.co.uk/lidl/Leaflet-Offers-16-22-July-2015/5/5.jpg) plus sweet chili sauce.
If not using the blender beware the clumps that will ruin the experience.