I use salt, pepper, herbs and spices, including garlic. Sometimes a pinch of onion powder too.
I try and stick to the proper unprocessed ingredients, but my exception is when I use Pataks pre-prepared curry pastes (which are delicious), or smoked chipotle paste.
I cook for my husband as well, and we both enjoy flavour and variety. I would much rather eat 98-99% carnivore long term, than try for 100% carnivore and burn out from boredom within a few weeks.
My main reason for removing veg from my diet was to avoid gut problems and joint aches. The very small amount of plant products I use don’t seem to cause problems in those areas, so am happy to continue.
(I do find that tomato makes my joints ache, so sadly I have now eliminated even the teasp of tomato paste I was using on ribs)