NEW YORK — There’s plenty of deliciousness in the array of bright, layered tarts, cakes and bite-size confections from Watt Sriboonruang, the chef who founded Rawsome Treats five years ago. She started selling them retail and wholesale online and has just opened her first shop and cafe. She’s a kickboxer from Thailand who says she relies on raw food for energy that does not come with weight gain. Many of her rich, stunning items rely on nuts and nut milks: Rawsome Treats, 158 Orchard St. (Rivington Street), 646-767-0373, rawsometreats.com.