Preheat broiler.
Melt butter in large skillet over medum-high heat.
Separate onion slices into rings; add to skillet.
Cook, stirring occasionally, until golden brown and tender, about 10 minutes.
Meanwhile, sprinkle 1 teaspoon paprika, garlic salt and pepper over both sides of pork chops.
Place chops on rack of broiler pan.
Broil 4 to 5 inches from heat 5 minutes.
Turn; broil 4 to 5 minutes or until chops are barely pink in center.
Combine cooked onion with sauerkraut, sour cream and remaining 1/4 teaspoon paprika; mix well.
Garnish chops with onion mixture, or spread onion mixture over chops and return to broiler.
Broil just until hot, about 1 minute.