Pre-heat your oven to 425 degrees.
Trim off and discard the thick, woody ends of the asparagus. Then spread the asparagus out onto a large rimmed baking sheet and set aside.
Add the butter and miso paste to a microwave safe bowl. Microwave until the butter is melted, about 30-60 seconds. Then stir to help incorporate the miso paste into the melted butter. Itâs OK if the mixture isnât completely smooth.
Pour the miso butter over the asparagus, using a pair of tongs to gently toss the asparagus so itâs coated on all sides. Sprinkle with the salt.
Transfer the baking sheet to your pre-heated oven and roast the asparagus for 12-16 minutes, or until crisp-tender, gently stirring them once half way through the cooking time. Remove from the oven and garnish with sesame seeds. Serve immediately.
