turned on broiler, while microwaving portobello mushroom in a bath of milk, butter, and snipped green onion +  cracked black pepper, 2 minutes.

sizzled some butter and brushed it onto sesame bun, with onion flakes, broiled 2 minutes

flipped and placed mushroom plus swiss cheese, and green onion from the milk mixture, broiled 2 minutes

drained liquid from mushroom, and added ranch dressing, then.. eaten. :P