In a large skillet or saucepan, melt butter. Add onion, sugar and salt; cook, ... exuded by the onions evaporates, about 10 minutes. Reduce ... pepper and Parmesan cheese.
Pour bouillon in crockpot. Cook onions slowly in large skillet in ... crockpot. Cover, cook on low 6 to 8 hours. Before serving top with grated cheese.