Thanh Tinh Chay in College Area is a 100-percent vegan Vietnamese restaurant at 4591 El Cajon Boulevard in San Diego, anchoring the Little Saigon section of the 92115 ZIP with more than 200 plant-based dishes prepared without MSG, preservatives, or GMO ingredients. Owner Van Bui drew on more than 10 years of nursing experience before opening the restaurant in 2024, structuring the menu around a $5 baseline price for most entrées — a deliberate decision to keep plant-based Vietnamese cooking accessible to the mid-city neighborhood. Yelp data ranked Thanh Tinh Chay fourth among the top 100 vegan restaurants in the United States and Canada, and first among all San Diego restaurants, with additional recognition as one of California's Top Soup Spots. The soup program is the kitchen's backbone — $5 bowls of Hủ Tiếu vegetable soup, Bún Riêu with fresh tomato over rice vermicelli, and Bún Huế layered with tofu, textured soy flats, reconstituted yuba sticks, and chả lụa chay, a vegan pork roll made from compressed tofu skin steamed with whole peppercorns in banana leaves. The plant-based juice program at FuelThyCells SeaMoss & Fruit Juice Bar targets the same health-conscious customer base that gravitates toward Thanh Tinh Chay's organic produce and clean-label approach. Every mock protein on the menu is made in-house, from deep-fried beef-style soy strips to turmeric-hued vegan chả trứng threaded with glass noodles — a technique library that predates the modern mock-meat industry by generations. The appetizer menu includes Bánh Bèo water fern cakes topped with shredded tofu and yams, and Bánh Xèo sizzling rice-flour crepes stuffed with bean sprouts, mushrooms, and tofu. San Diego pho and Vietnamese soup searches pull significant city-level volume, and the vegan interpretations here compete for those queries by delivering the same depth of broth, noodle variety, and condiment plate that define the non-vegan originals on El Cajon Boulevard. Complimentary fruit-infused water — apple juice base cooked with lemon, mint, strawberry, and lychee — arrives at every table, and a complimentary dessert course closes each meal with crème brûlée, vegan cheesecake, or chocolate pudding. SDSU sits roughly a mile east, and the El Cajon Blvd corridor funnels student traffic past the restaurant on the way to and from the Asian grocery and noodle-shop cluster between 45th and 54th Streets. The Chinese-American stir-fry counter at Wei Wei Asian Express serves the faster end of that same corridor, splitting the lunch crowd between quick wok plates and Thanh Tinh Chay's sit-down, table-service format. The intimate dining room seats seven to eight tables, and the lucky opening time of 10:32 — a number symbolizing fortune and prosperity in Vietnamese numerology — signals the cultural specificity that runs through every detail of the operation.