Preheat oven to 250°.

Place bread in a food processor; pulse 10 times or until coarse crumbs measure 2/3 cup. Place breadcrumbs on a baking sheet. Bake at 250° for 30 minutes or until dry.

Heat 1 1/2 tablespoons oil in a large nonstick skillet over medium heat. Add garlic; cook 30 seconds, stirring constantly. Remove from heat, and let stand 5 minutes. Return pan to heat. Stir in breadcrumbs, and cook 6 minutes or until lightly browned, stirring frequently.

Cook pasta according to package directions, omitting salt and fat; drain. Place pasta in a large bowl. Add 1 1/2 teaspoons oil, breadcrumbs, parsley, lemon juice, salt, and black pepper; toss gently to combine. Serve immediately.

Pierce potatoes with a fork. Microwave on HIGH 13 minutes or until tender. Cut in half; cool slightly.

While potatoes cook, heat oil in a saucepan over medium-high heat. Add onion; sauté 3 minutes. Add broth. Combine flour and 1/2 cup milk; add to pan with 1 1/2 cups milk. Bring to a boil; stir often. Cook 1 minute. Remove from heat; stir in sour cream, salt, and pepper.

Arrange bacon on a paper towel on a microwave-safe plate. Cover with a paper towel; microwave on HIGH for 4 minutes. Crumble bacon.

Discard potato skins. Coarsely mash potatoes into soup. Top with cheese, green onions, and bacon.

Preheat oven to 425°.

Arrange half of the potato slices in an 11 x 7-inch baking dish coated with cooking spray.

Heat oil in a large nonstick skillet over medium-high heat. Add leek; sauté 10 minutes or until lightly browned. Stir in garlic, salt, and pepper. Spoon half of leek mixture over potato slices; top with half of tomatoes and half of cheese. Repeat layers with remaining potatoes, leek mixture, tomatoes, and cheese.

Bring milk to a boil over low heat in a skillet; pour over potato mixture. Cover and bake at 425° for 30 minutes or until potatoes are tender. Uncover; bake an additional 15 minutes or until golden brown. Let stand 5 minutes before serving