Prepare two sheet pans lined with parchment paper and preheat oven to 400 degrees. Halve and add potatoes to one of the pans in a single layer.
To the second pan, add trimmed asparagus. Drizzle potatoes with 2 Tablespoons olive oil, 3/4 teaspoon salt, 20 grinds pepper and 2/3 of the granulated garlic. Add the remaining 1 Tablespoon oil, 1/4 teaspoon mineral salt, 10 grinds of pepper and remaining garlic powder to the asparagus. Toss well.
Assemble potatoes cut portion down then roast for 25-30 minutes. In the last 10 minutes of potatoes cooking, add the asparagus to roast for 10 minutes until bright green and crisp tender.
While vegetables are roasting, prepare the Dill Compound Butter. Simply mix together room temperature pastured butter with minced dill, lemon, garlic and seasonings.
In a piece of plastic wrap, add the butter and roll and shape plastic wrap to create a marshmallow-like shape. Freeze while vegetables are baking.
To assemble, add asparagus first to the platter and top with potatoes. Slice herb butter in 4-5 large coins and add atop to melt down potatoes and asparagus.