I'll give you some more cheap things for early lvls or small characters:
Cooked carrots, awesome for phlegm, granted you need to grow them in pots first, but it's doable.
Also pot-able: fried lavender for phlegm, plain wild garlic for red, all super effective
Fishtraps!

Note: you can just gather reeds for fibres, spam traps, fill them with whatever you got, from wood choppings to all plants & meat & ...
You can dry fish, drying racks are cheap and dried fish is quite nice for low lvls serving all colors, just takes long to dry.
Also from fishtraps:
Crusted crawdads, very nice for blood.
Oyster, either smoked (I know, not newbie friendly) or almost as good in form of fried oysters, both for black.
Or, again if you got pots to grow stuff: red seafood salad
Also sizzled grubs used to be small but nice for yellow, were nerfed though for no reason.
Also berrys, you can grow them in pots (yellow, blue) or plant bushes (red, black) (or dig out and carry home bushes if you cant plant them yet).
Berries on a straw is quite good for low lvls and even doable just by walking around and picking up stuff.
Nuts are also quite useful for all colors simply as nutcracker suite if you can grow red bellpeppers in pots, with those it also restores the meat foodgroup, or slugs&bugs with green.
Salty nuts is a bit more work for gathering the salt, but I heard you can gather a lot on the shores of providence and some other places.
Also note: Squirrel cuts used as "any raw cut" in garlic spitroast and garlic rabbit restores the nuts foodgroup.