A lassi is simply yogurt and water usually blended with some spices. Warm cumin mixes with sour and salt for an excellent after dinner digestive. This lassi is specific for Vata dosha. Search on yogurt for Pitta and Kapha pacifying lassis.
Achar means pickle in Bengali. Bengali's have a number of different pickles and chutneys using mangoes, tamarind, other fruits and spices. We love the sour, savory spiciness of tamarind achar. It is altogether over-stimulating!