Amino Acid is a simple organic compound containing both a carboxyl (—COOH) and an amino (—NH2) group.
Here are some foods that have them.

Eggs-scrambled, or fried.
Meat-such as steak,beef,pork chops, any meat.
Soybeans
quiona- a vegan dish that is essential in storing protein.
Poultry
Fish
Some vegetables, or plant base suplements.
Beans
Grains
Nuts
Seeds
Here are some pictures of foods that hold amino acid.
Vegetarians do not get a lot of amino acids mainly because they are found in protein stacked food like meat, but they can be found in vegetarion foods to keep their body healthy.