Preparation Cook asparagus in medium saucepan of boiling salted water 1 minute. Drain. Melt 2 tablespoons butter in heavy large skillet over medium heat. Add mushrooms and garlic; sauté until mushrooms are tender, about 5 minutes. Add onion; stir 1 minute. Add soy sauce, sake, hon-dashi and cayenne; simmer until sauce thickens slightly, about 3 minutes. Remove pan from heat. Melt remaining 2 tablespoons butter in heavy medium skillet over high heat. Season scallops with salt and pepper. Add scallops to skillet and sauté until almost cooked through, about 3 minutes. Add asparagus and toss until heated through, about 1 minute. Add sauce and simmer 1 minute. Divide between 2 plates and serve.
Preparation Cook asparagus in medium saucepan of boiling salted water 1 minute. Drain. Melt 2 tablespoons butter in heavy large skillet over medium heat. Add mushrooms and garlic; sauté until mushrooms are tender, about 5 minutes. Add onion; stir 1 minute. Add soy sauce, sake, hon-dashi and cayenne; simmer until sauce thickens slightly, about 3 minutes. Remove pan from heat. Melt remaining 2 tablespoons butter in heavy medium skillet over high heat. Season scallops with salt and pepper. Add scallops to skillet and sauté until almost cooked through, about 3 minutes. Add asparagus and toss until heated through, about 1 minute. Add sauce and simmer 1 minute. Divide between 2 plates and serve.