Meanwhile, grate the cheese, and layer cheese and bread in an oven proof soup bowl (Individual bowls are better than one serving dish) Start with a thin layer of cheese, top with bread, another layer of cheese, and end with a layer of bread, reserving some cheese for later.
When the soup is cooked, spoon onion and soup into soup bowls and top with remaining cheese.
Place under grill for 5 - 10 minutes, keeping an eye on it till the cheese is browned. The dishes will be hot, so transfer carefully to a counter.
For the Thermomix
Add one or both cheeses to the Thermomix (drop over running blades) speed 5, 10 - 15 seconds.
Clean the bowl and set the cheese aside.
Add the onions and butter to the Thermomix and blend 10 seconds speed 4.
Add the stock (remember to keep to the limits in the Thermomix, so 2000g for TM31)
Cook reverse speed, Varoma/15 mins, without the MC
Meanwhile in the soup dishes, start with a thin layer of cheese, top with bread, another layer of cheese, and end with a layer of bread, reserving some cheese for later.
When the soup is cooked, spoon onion and soup into soup bowls and top with remaining cheese.
Place under grill for 5 - 10 minutes, keeping an eye on it till the cheese is browned. The dishes will be hot, so transfer carefully to a counter.
Enjoy
Recipe by Keeper of the Kitchen at https://www.keeperofthekitchen.com/2015/08/10/french-onion-soup-kids-in-the-kitchen/