INGREDIENTS
1
Parsley, Fresh
5
Yellow onions (, peeled, halved and thinly sliced (750g / 1.5 lb)), brown
30 g
Plain flour
1
Salt and pepper
4
slices French baguette or sourdough bread
100 g
Butter, unsalted
100 g
Gruyere
1.5 litres / 6 cups / 1.5 quarts chicken or beef broth (, low sodium/salt reduced (Note 1))