It keeps it from burning and sticking to the pan. Peanut oil is used for high temperature cooking. Olive and canola oil is better for you heart, compared to other oils. Vegatible and olive oil are...
Pochero is a stew so you must 'boil' the chickpeas, 'saute' the onion, 'braise' the meats in the broth. Throughout the preparation you would 'chop' the onion and 'slice' the meat as well as 'stir'...