In a skillet cook the onion and 2 tablespoons of the butter over moderately low heat, stirring, until it is very soft. In a heavy saucepan melt 6 tablespoons of the remaining butter over moderately low heat, whisk in the flour, and cook the roux, whisking, for 3 minutes. Add the milk, scalded, in a stream, whisking, and bring the sauce to a boil. Simmer the sauce, whisking, for 1 minute and add salt and pepper to taste. Peel the potatoes and slice them 1/8 inch thick. Spread about one third of the sauce in the bottom of a well-buttered 3-quart gratin dish at least 2 1/2 inches deep, cover it with a layer of potato slices, overlapping the slices slightly, and cover the potatoes with one third of the onions. Sprinkle the onions with one third of the Cheddar and continue to layer the remaining sauce, potatoes, onions, and Cheddar in the same manner. Sprinkle the top with bread crumbs, dot it with the remaining 1 tablespoon butter, cut into bits, and bake the mixture, covered with foil, in the middle of a preheated 400°F. oven for 20 minutes. Remove the foil and bake the potato mixture for 30 to 35 minutes more, or until the top is golden and the potatoes are tender.

Preheat oven to 300°.

Combine the first 6 ingredients in a small bowl.

Sprinkle pork with 1/4 teaspoon salt and 1/8 teaspoon pepper. Heat the oil in a large nonstick skillet over medium-high heat. Add pork; sauté 5 minutes on each side or until golden. Remove pork from pan. Add onion and mushrooms to pan; sauté for 3 minutes. Carefully add whiskey to pan; cook for 1 minute or until liquid almost evaporates. Stir sour cream mixture into pan. Return pork to pan; spoon sauce over pork.

Wrap handle of skillet with foil. Cover and bake at 300° for 1 hour. Serve immediately.

Prepare grill to medium-high.

Sprinkle steak with rosemary, pepper, and kosher salt. Place steak on grill rack coated with cooking spray; grill 7 minutes on each side or until desired degree of doneness. Remove from grill; let stand 10 minutes. Cover and keep warm.

While steak rests, heat oil in a small saucepan over medium-high heat. Add shallots; sauté 1 minute. Add tomato paste; cook 1 minute. Stir in broth and sugar. Bring to a boil; cook 3 minutes or until thickened. Remove from heat; stir in bourbon, vinegar, and 1/8 teaspoon salt. Cut steak diagonally across grain into thin slices. Serve with sauce.