Thanu "Joe" Sinevang and his daughter Lena Sumonthee found success after moving from Bangkok to America, and still more success after relocating their Origin Asian Bistro from South Beach to South Miami. The small square dining room hardly prepares diners for the big, round flavors inherent in chef Sinevang's mouthwatering menu of Thai, Japanese, Korean, Cambodian, and Chinese compositions. Sushi, sashimi, carpaccios, and tartares are splendidly fresh, but that is just the beginning -- there are plenty of other pickled, peppered, piquant pleasures to come. Crescents of sweet ripe papaya frame charred slices of rare filet mignon. Pan-roasted salmon is soothed by velvety saffron curry sauce. Fat-as-doorknob sea scallops are folded into ethereal custard and then steamed in a banana leaf. Sumonthee manages a well-trained waitstaff; a full bar slings specialty tropical drinks that in the old days would come with parasols, and prices are moderate -- in the $20 to $30 range for main courses. SoBe's loss is SoMi's gain.