Thai One On in Carlsbad's La Costa neighborhood serves Thai cuisine and sushi from 7750 Rancho Santa Fe Road, near the Omni La Costa Resort. Established in 2019, the restaurant pairs a made-to-order Thai menu with a full bar and live music programming, building a dinner-and-entertainment format on Rancho Santa Fe Road alongside the regional Mexican moles at Fresco Cocina in the La Costa dining cluster. The Thai menu spans curries, pad thai, boat noodles, and stir-fries prepared with locally sourced ingredients, while specialty appetizers like spicy chicken wings with chili and lemongrass and golden fingers — bacon-wrapped shrimp — anchor the bar menu. Vegan and gluten-free adaptations run across the full menu, and the dining room features Thai-inspired decor with wooden tree centerpieces and a golden backdrop, setting an atmosphere distinct from the fairway views at Aviara Golf Club in the Aviara corridor south. The soft-shell crab arrives whole, flash-fried and served with the chef's proprietary sauce over spring mix, running as the kitchen's highest-complexity single-protein plate.