It makes a light sauce that we add to a burger with melted Swiss cheese.???Wetli says the department also does a lot of high-end dishes for catering, for which he creates a mushroom dust.???We like to take dehydrated fresh shiitakes and turn them into mushroom dust or powder,??? Wetli says. ???We take an 18-to-20-ounce block of New York strip and roll it in the powder and other spices and cut it i