Tarragon potatoes

1 large onion, chopped.
1 Tbs peanut oil.
3 large potatoes, sliced as in scalloped potatoes.
1 bay leaf.
2 Tbs balsamic vinegar.
Pinch of cayenne.
1 Tbs chopped fresh tarragon.
1\2 cup water.

Saute onion in oil in skillet until transparent.
Add potatoes and sauté for 1 minute.
Add water and other ingredients and simmer with lid on for 30 minutes.
Remove and discard bay leaf.

Serve and garnish with fresh parsley.