To find these ingredients in Minecraft Legendary Edition you will need to find their seeds on chest or harvest themin a structure's farm, this is because "unknown seeds" are disabled.
You can put any of these in a crafting table to get their seeds, each crop drops between 1~5 crops but no seeds.
The Asparagus can be used as a ingredient in several Crock Pot recipes and is required for dishes like Asparagazpacho, the asparagus has a vegetable value of 1
Corn can be used in several Crock Pot recipes like Fish Tacos and has a vegetable value of 1 in the recipes.
Eggplant can be used in several Crock Pot recipes like Stuffed Eggplant and has a vegetable value of 1 in the recipes.
Onion is the main ingredient in the Crock Pot recipes for dishes like Bone Bouillon and has a vegetable value of 1 in the recipes.
Pepper can be used in several Crock Pot recipes like Stupped Pepper Poppers and has a vegetable value of 1 in the recipes.
Toma Root can be used as an ingredient in several Crock Pot recipes like Salsa Fresca and has a vegetable value of 1 in the recipes.
Other Ingredients
Cooked Egg is the result of cooking and Egg in a furnance.
It can also be used in Crock Pot recipes.
Frog Legs are a Meat Food item that can be obtain by fishing in Plains,Swamp or Forest.
They have a Meat value of 0.5
The can be used to make Froggle Bunwich in the Crock Pot.
Cooked Frog Legs are cooked from Frog Legs in a furncance.
Milk Bottle is a Dairy Food Item.It can be obtained from Cows or Mooshrooms by interacting with an empty Bottle. But drinking Milk Bottle will not have any effects.
Naked Nostrils are Meat Food item that dropped by Hoglin upon death, Raw Naked Nostrils are needed to craft the Milkmade Hat
Charred Nostrils
Charred Nostrils is obtained by cooking Naked Nostrild in a furnance.