User blog comment:BannedLagiacrus/ Discussion of the Week: Monster Meals/@comment-22748142-20141111093353/@comment-4009941-20141111143830

You know there is quite a lot for vegetarians to eat if you count all the food you can order in MHFU and MH3U but it appears we do not have a list for MH3U vegetables and grains so someone could fill that part in for me I guess.

http://monsterhunter.wikia.com/wiki/MHF1:_Felyne_Kitchen_Guide#Food_Ingredients

On Frontier you can gather ingredients to cook on location and for vegetarians we got: Django Leeks(Wild from the jungle), Sliced Cactus(Desert), Marbled Tomato(Grows in the volcano only oddly), Onimatsutake Mushroom(Great Forest and says its ugly but tastes good), Silver Rice Grass(Snowy Mountains and Polar Sea), Fist Rice(Giant rice that a single grain is as big as a fist), Ancient Beans(Tower and Volcano and as the name says very old naturally aged beans), U~ōmiru Wheat(Cannot grow in cold regions), Rainbow Lettuce(This one is actually a rare item and only able to get past HR500. It says when you eat it, it gives the illusion of different flavors.), Queen Parsley(Scent described as elegent like you are floating(?)), and Dan Spice(Apparently has a stimulating scent that is defined as making everyone want to dance).