Ají Amarillo (Yellow Pepper)
Ají amarillo is the number one pepper used for cooking in Peru. Native to the country, ají amarillo has been used as far back as the Inca times. Many traditional Peruvian dishes are made with it.
The yellow pepper is particularly tough on stomachs, and isn't recommend for people with ulcers.
Ají amarillo is a "must have" ingredient when cooking: