I am a vegan and am currently seeking the right path for me. I was reading about Canaanite paganism and whilst not directly sacrificing an animal a key belief appears to revolve around the buying and eating of meat in honour/offering to deities.
There's a couple of ways to think about this, really, and to go about it.
First, it's going to depend on why you're vegan: some people are for health reasons (or because they feel better when they are) but would be okay with it for occasional ritual purposes if those offerings came from humanely raised (and killed) animals. I'm guessing that's not you, but it's worth mentioning.
The second thing is whether it's going to limit other possible offerings or ritual foods - how would you feel about honey? About eggs? About dairy? (Dairy is a fairly common offering in some places, and eggs and dairy are two foods that show up a lot in seasonal or festival meals.) Are you living in a place where you can create meaningful seasonal or ritual meals reliably, even if those meals don't involve meat or eggs or dairy?
(You don't need to do those things, mind you, but if you're looking for a community of other practitioners in any form, even online, it's probably going to be useful to have things you can share when they're all talking about their ritual offering to X or what they're making for celebration Y. That requires a certain number of food skills that go beyond just keeping yourself fed, usually, if you need to look at alternatives and adjustments.)
Third, it's good to remember that historically speaking, limiting your food choices was a survival issue. It's not generally something historical peoples did in ways that cut out huge classes of food items (a particular animal, yes, a particular method of slaughter, yes, but not all animal products) It's hard to build a religion - or a community - when you're starving to death.
In fact, in some communities, festivals for the Gods might be the only time people reliably got meat in their diet, or a surplus of food between subsistence living (this is still true, for example, in a number of Haitian voudoun communities, where the loa have specific food and drink that must be present at some rituals)
It's also worth noting that a lot of the food prohibitions we know of usually have to do with either an animal sacred to a particular deity (and often not observed by people who were not particularly focused on that deity) or have some food-safety reasons behind them, now we know more about that topic, rather than being rooted in individual decisions by the practitioner. It's not that those don't matter, they were just not the thing the community as a whole paid a lot of attention to often, and while they probably happened, they're not a kind of thing that shows up a lot in historical documentation.
(I can think of examples from Catholicism - various fasting saints, for example - but that's well into a period where documentation was much more widespread, and where writing about individual people was much more common. And even then, they were vastly exceptions to the usual community practices.)
What does that leave?1) If you go the route of historical-culture based stuff, you can likely find individual deities where offerings will be things you can work with. However, chances are pretty good that some of the common offerings for any ancient culture will include animal products (whether for that deity or for others in the culture) so you'd want to look to see if there are alternatives.
(For example, one of the standard offerings to the Kemetic deities - the netjer - is cool water. Incense is a common one many places, though there will be ingredients in some incenses that strict vegans would also want to avoid.)
2) You can honour and worship a specific deity (or deities) from a particular culture, but do it outside their historical practice.
Some people do this through using Wiccan based (or historical witchcraft based) methods (where the most common ritual meal is wine and bread, but there are options, and seasonal meals could generally be adapted, though you might have some complications if working with a group.) There are other methods around too, but what will be accessible to you depends a lot on your location and your willingness to dig through some widely ranging sources.
Some people design their own practices, based on whatever sources make sense to them. The downside to this is threefold: it's a lot of work, it takes some specific skills (that you can likely learn, but most people don't have to start) to build something that's sustainable for a long time, and you can feel awfully lonely.
3) You can sort out some compromise for yourself (as above) that treats religious rituals a bit differently from other parts of your life.
Or, for example, religious rituals with others differently (so that you might offer something that you're comfortable with in private, but understand that if you do ritual with others, it might involve meat. Or you might decide you can do dairy but not meat, or ... well, you get to decide. Depends a lot on your reasons.)
I know, for example, people who keep kosher at home, but when in a restaurant with friends will not fuss about whether the restaurant is kosher (because that massively limits options many places) and instead order an appropriate meal without worrying about the kitchen. I know people who avoid certain foods *except* in ritual. And so on.