It's well-known that Judaism and Islam have complex dietary codes, known as Kosher and Halal respectively. But there's a subset of Hindus, specifically some South Indian Brahmins, who follow a dietary code leaps and bounds more complex. It's known as Acharam, and it involves not eating meat, not eating eggs, not eating garlic and onions, and only eating food cooked by Brahmins. But that's just the beginning. It has very complex rules with names like Madi, Pathu, Echil, and Theetu. This Quora answer summarizes some of them. (It also includes some non-dietary rules of hygiene, but that's irrelevant for this question.)
My question is, are there any restaurants that comply with the rules of Acharam, similar to Kosher restaurants and Halal restaurants?
My grandmother follows Acharam, and I often feel bad that when our family goes to Indian restaurants, she's the only one who doesn't eat anything because the restaurant doesn't follow Acharam. It's not actually that hard to follow the rules of Acharam in cooking; my grandmother does it and our other family members are able to do it for her. So it wouldn't be that difficult for a restaurant to become Acharam-compliant.