Peel the onions and cut into rings. Peel off the garlic clove and mash it with a little salt. Roast both in hot oil until golden. Now dust with the flour and deglaze with the hot stock and white wine. Season the whole thing with salt, pepper and curry powder.
For gratinating, toast the white bread slices first. Place in fireproof soup bowls and then pour the soup over them. Grate the cheese and sprinkle over it.
Now bake the soup in the preheated oven at 225 ° C for about 10 minutes. Serve immediately.