You present some very compelling ancient adaptations (With evidence!) which easily convert into our modern day. Well done! I have purchased some of the votive figures you suggested.
On the question of mola salsa, for a long time many experienced cultores were saying non-animal offerings do not require mola salsa. For a long time I followed this suggestion. But I am starting to doubt this being traditionally correct.
Here is the problem. We have very limited written sources on non-animal offerings. This said we know they occurred. They were also probably much more common from a practical standpoint. We know about animal offerings because they were more grand and expensive thus written about. Because of this problem we need to work harder to sort out evidence for non-animal offerings.
But in Ovid's Fasti there is compelling evidence mola salsa was used for non-animal sacrifice in Book 1.127-8. There is says; "but when the priest offers me a barley cake and spelt mingled with salt, you would laugh to hear the names he gives me, for on his sacrificial lips I’m now Patulcius and now Clusius called."
Spelt + salt = mola salsa?
Barley cake = non-animal offering
From this I am starting to think mola salsa ceremoniously transfers anything, animal, vegetable, grain or object to the divine.
My clever friend, what do you think?
L. CURTIUS PHILO COS. SEN.