Pavakka is the Malayalam word for Bitter melon or Bitter gourd. Kaipakka is another name of Bitter Gourd in Malayalam.
Pavakka is cooked in various ways in South of India. It is stir-fried with various spices and it is called Pavakka Olarthiyathu or cooked with browned grated coconut and various spices called Pavakka Theyal/Theeyal. Some housewives who are inventive enough also make them as Pavakka Achar/Achaar
Below is a picture of raw Pavakka which is available in Kerala all the time and the various dishes made from Pavakka from Kerala, a state in the south of India.
Pazham is the Malayalam word for Banana and Pazham Puzhungiyathu means steamed bananas/plantains in Malayalam. There are different varieties of bananas in India used for cooking (frying, steaming, etc).
Potti/Pooti Olarthiyathu refers to one of the dishes from Kerala, India which is stir-fry cow's intestines (Potti/Pooti). It is made from fresh and thoroughly cleaned cows/ goats or buffalos' intestines with lots of spices and curry leaves . It is usually served very spicy from chopped red chilies.
This picture is made from while the Potti/Pooti was still being cooked to be served for a pre-wedding dinner which is a tradition in Kerala. So much to cook for hundreds of relatives and friends invited for pre-wedding dinner party.
Olarthiyathu which means stir-frying is also spelled Olathiyathu and Ularthiyathu
Another version below of the Potti is not chopped intestines, but made from bigger slices so the intestines are stil recognizable