1. Preheat oven to 350°.
2. Cook bacon in a large skillet over medium heat until crisp. Remove bacon from pan using a slotted spoon, and crumble. Add onion to drippings in pan, and cook for 5 minutes, stirring occasionally. Add leek and garlic; cook for 2 minutes, stirring frequently. Combine onion mixture, grated potato, cheddar cheese, 3/4 teaspoon salt, black pepper, and 2 large eggs in a medium bowl, stirring well.
3. Divide the potato mixture into 8 equal portions, and shape each portion into a 1/2-inch-thick patty. Squeeze moisture from each patty. Melt 1 tablespoon butter in a nonstick skillet over medium-high heat. Add patties to pan; sauté 2 minutes on each side. Transfer patties to a baking sheet; bake at 350° for 15 minutes or until set. Top with crumbled bacon and sour cream.