Half regular spaghetti half protein spaghetti. Earth Balance soy-free vegan butter. Carrot baby food for the sauce. Giorgio sliced mushrooms.
It's pretty bland (although the mushrooms are amazing omg).
I have A LOT of food sensitivities, am poor, and have limited energy due to my health issues, so I just experiment with random stuff. I know it probably doesn't seem like much of an experiment but I'll probably try different things as I go along.
Pray it doesn't kill me :3
A dash of MSG would reinforce the glutimates from the mushrooms and is one of the secrets of flavour. The only other thing I might suggest - if you're okay with black pepper, a little freshly ground would also be a nice touch (you typically don't want as much freshly ground as pre-ground because the flavour profile is very different and fresh ground is much stronger).
I don't have your apparent dietary restrictions/decisions, but I've got health/energy issues, so I've tried to do a lot of simplifying. For me, any al dente pasta with butter, salt, msg, fresh ground black pepper, butter, and oh, more butter - that's just a tasty meal.
I've also found that I can make something that reminds me a little bit of chili mac if to the above I add some chili beans - which should keep things on the vegan side since it sounds like you are. I suspect nutritional yeast might be good as I've heard it's a good sub for cheese powder (which I have and add to things).
I dunno if your meal was shitty food porn or not, but good eats is good eats :)