Easy and super delicious. I thought the surprisingly complex flavor was reminiscent of a good cheese sauce. This is a versatile recipe that I believe handles substitution and addition of ingredients well. I've made it as is, but also with onion and garlic in place of shallots. It is also great with sauteed vegetables like spinach and grape tomatoes. Don't add additional salt. The miso has plenty! If using salted butter in place of unsalted, you may want to cut back slightly on the miso.