Grilled King Salmon with Asparagus, Morels, and Leeks

INGREDIENTS

• 1 pound slender asparagus, trimmed and cut in half on a diagonal
• 1 large leek (white part only), thinly sliced and rinsed well to remove dirt
• 3 tablespoons butter
• 2 teaspoons chopped thyme leaves
• 3/4 teaspoon kosher salt, divided
• 1/2 teaspoon pepper, divided
• 1/2 pound fresh morel mushrooms, rinsed well and halved lengthwise, or 3/4 oz. dried morels*
• 1/4 cup fino sherry or dry white wine
• 1 tablespoon olive oil
• 1 king or coho salmon fillet (1 1/2 lbs., 1 in. thick), with skin
• 1 cup whipping cream