2 tablespoons olive oil
2 large onions, thinly sliced
2 pounds red potatoes, thinly sliced
1 1/2 pounds russet potatoes, peeled, thinly sliced in ½ rounds
3 large garlic cloves
2 tablespoons butter, melted (or olive oil)
1/2 cup chopped parsley
1 1/4 cups chicken stock or soymilk
2 tablespoons of thyme