Cashew nut is made up of a fruit in which the kernel is embedded. The real fruit of the cashew is commonly a nut. It is a kidney- or heart-shaped achene, in any normal variety. Its colour varies from bottle green to greyish brown (dried fruit).

An onion is a round vegetable with a light brown skin. It has many white layers on its inside which have a strong, sharp smell and taste. Finely chop the onion, and add it to the pan with the garlic.

Potato, Solanum tuberosum, is a herbaceous perennial plant in the family Solanaceae which is grown for its edible tubers. ... The potato plant produces white or blue flowers and yellow-green berries. 

Potatoes are a great source of vitamin B6. This plays a vital role in energy metabolism, by breaking down carbohydrates and proteins into glucose and amino acids. These smaller compounds are more easily utilized for energy within the body.

Tomatoes contain a chemical called lycopene, which is thought to play a role in preventing cancer. It's easier for the body to use lycopene that comes from tomato products, such as tomato paste or tomato juice, than from fresh tomatoes. Tomato might also help reduce the risk of heart disease and sun damage.