2: Pour 3 tablespoons olive oil into a frying pan on high heat. When really hot, add the courgette slices and sauté for a few minutes. After cooking, they should still be reasonably firm. Salt, pepper and scatter with thyme. Set aside.
4: Pour 3 tablespoons olive oil into the same pan as before on high heat. When hot, add the chopped onion. Cook for 1 minute without colouring.
5: Add the chopped mushrooms and mix well...
6: ...then sauté for a few minutes. The mushrooms should just begin to brown.
7: At the end of cooking, salt and pepper then add the chopped parsley. Take off the heat and set aside.
8:
Prepare and cook the slices
Preheat the oven to 360°F (180°C). Lay 4 slices bread on a baking sheet.
9: Divide the courgettes between the slices...
10: ...then add the mushrooms...
11: ...and top with the ham and cheese cut into slivers.
12: Cook in the oven for 10 to 20 minutes, until the cheese has melted and is starting to brown. Serve immediately.
Remarks
Kérinou is a district of Brest, in the Brittany region of northwest France. In keeping with the spirit of the recipe, try to use a French "tome" cheese if possible, preferably from Brittany. If you like a little more crunch, you can toast the bread before adding the toppings.