Trim stems from Swiss chard
Cut leaves into 1” pieces
Wilt in boiling water until limp
In a large saucepan melt butter
Saute onions and garlic until onions start to turn golden color
Whisk sour cream and milk together
Pour over onions and heat until just starting to bubble
Add wilted Swiss chard leaves
Bring to a boil, stirring frequently
Reduce heat to just under boiling
Cook 5-7 minutes until sauce thickens slightly
Add sea salt and fresh ground nutmeg to taste