Glad you liked it
And not surprised you found it a little bland - I always add a little more of this and that according to what I feel like and what they are eaten with.
Here's
a link to a video (in Danish), showing a way to mix it (he dice the onion in a blender with the milk - a good idea for large portions).
Next time (if there is one), try wheat flour and water. Flour will give it a nice, even and light texture. I've also tried using half flour and half wheat bran - it soaks up a bit more liquid, so you have to adjust it, but it's quite nice.