Assuming that Wurt being vegetarian means she cannot consume meat or meat based foods (instead of for example losing sanity when eating such foods) a change in play style would be needed for those meatballs fans. Here are some valuable information:
As of today there are 29 out of 50 crock pot dishes that are considered non-meat in game, and most of them accept cheap and abundant inedible ingredients like Twigs
See the list here:
All of the fruits has fruit value of 1, the exception is Berries, Juicy Berries and Lesser Glow Berry which has fruitvalue of 0.5.
It is worth mentioning that some items are still considered as fruit in game, even though it may not be so obvious for new players: Glow Berry
Cooked versions of every fruit, if such exist, has identical fruit value as its raw counterpart.
Durian/Extra Smelly Durian both gives 25 hunger but also lowers sanity by 5. Raw Durian lowers health by 3, cook it to remove this penalty.
All of the veggies has veggie value of 1, the exception is Red Cap, Blue Cap, Green Cap and Cactus Flower which has veggie value of 0.5.
It is worth mentioning that some items are still considered as veggie in game, even though it may not be so obvious for new players: Toma Root, Lichen, Cactus Flesh, Ripe Stone Fruit.
Cooked versions of every veggie, if such exist, has identical veggie value as its raw counterpart.
Cactus, Lichen and Stone Fruit still produce their products in winter unlike every other plants
Try using Merms to help you hunt down heated Salamanders to get valuable Dragon Fruit
Pumpkin/Hot Pumpkin gives whooping 37.5 hunger, avoid using it for crock pot dishes when you need hunger
Eggplant/Braised Eggplant gives 25 hunger, similar to Corn, Roasted Potato and Cooked Asparagus.
Bonus: Braised Eggplant, Roasted Potato and Roasted Toma Root also heals for 20 health. Think twice before using those in crock pot since the sum of stats of dish sometimes may not exceed the sum of stats gained from individual ingredients.
Rest of the veggies usually gives 9.375 and 12.5 hunger, those will mostly yield crock pot dishes with positive stat gain
Eggs and Meats
Assuming Wurt wont be able to consume meat of all kind, she can easily convert to Eggs using Bird Cage with any bird trapped inside. Recipes that excludes meat fillers, most of the time does not limit eggs usage as a filler. However most of the recipes that accept Eggs as a filler, also accepts cheap inedible resources like Twigs as filler, so better leave that eggs for Pierogi
Tallbird Egg has value of 3, Egg has value of 1
You can still put meat to Crock Pot and produce non-meat dishes, given that you don't use more than 1 monster tag (coming from meat or durian). Those dishes includes: Mandrakes Soup, Pumpkin Cookies, Stuffed Eggplant, Waffles, Jellybeans and Powdercake.
Cooked versions of every egg, if such exist, has identical egg value as its raw counterpart.
Dairy and Sweeteners
Butter is rare resource that when eaten gives 40 health and 25 hunger
Butter and Electric Milk has value of 1 Dairy
Honey and Honeycomb has value of 1 Sweetener, Royal Jelly has value of 3
Royal Jelly a boss item is better used for making Jellybeans, however eaten raw gives decent stats of 20 health and 25 hunger
Honey is easily farmed resources that can be amassed very quickly. One portion gives you 3 health and 9.375 hunger, but since it has very long shelf life and you will end up having a lot of it, consider Honey as your second grade snack food.
There are many other edible items, but since they not necessarily fit into above categories I will list them here.
Butterfly Wings very easy to get all year round, except winter. Each piece restores 8 health and 9.375 hunger. It can also be used as a filler in every Crock Pot dish, and is needed for Butter Muffin dish
Roasted Birchnut restores 1 health and 9.375 hunger upon consumption.It can also be used as a filler in every Crock Pot dish, and is needed for Trial Mix dish. Cutting down third level Birchnut trees in Autumn rewards two Birchnuts
Kelp Fronds gathered on the sea can be dried on Drying Rack to give you light snack that restores 10 sanity and 9.375 hunger
Glommer's Goop can be eaten for nice 40 health and 9.375 hunger, but it also lowers sanity by whooping 50 points.