Preheat oven to 400°.
Arrange potato slices in a 13 x 9-inch baking dish coated with cooking spray. Sprinkle with 2 tablespoons sugar; arrange bacon on top. Bake at 400° for 30 minutes. Turn potatoes over; bake an additional 30 minutes or until tender. Keep warm.
Heat oil in a large nonstick skillet over medium-high heat. Add onion and 2 tablespoons sugar; cook 6 minutes or until onion is tender and lightly browned, stirring frequently. Stir in water, vinegar, and ginger; bring to a boil. Cook 3 minutes, and remove from heat.
Trim fat from pork, and cut crosswise into 8 pieces. Place each piece between 2 sheets of heavy-duty plastic wrap, and flatten to 1/2-inch thickness using a meat mallet or rolling pin.
Lightly spoon flour into a dry measuring cup. Place 1/4 cup flour in a shallow dish. Combine 1/4 cup flour, ground pecans, and pepper in a separate shallow dish. Dredge pork in flour, shaking off excess. Dip pork in egg whites; dredge in pecan mixture, coating both sides.
Melt butter in pan coated with cooking spray over medium-high heat. Arrange pork in pan in a single layer. Cook 3 minutes on each side or until browned. Top pork with onion mixture; sprinkle with chopped pecans. Serve with sweet potatoes.