cauliflower with tuna

ingredients:
1 head cauliflower medium
200g mushrooms, cut into strips
1 large or 2 small onion, cut into large cubes
1 can of tuna drained well
100g grated cheese
4 tablespoons cooking oil has
salt
pepper
thyme or parsley
4 eggs
method:

Separate the cauliflower into florets and cook in salted water, then drain.
Heat the oil in a pan and fry the onion for 5 minutes over low heat.
Add the mushrooms, salt and pepper.
Continue to fry until total evaporation of liquids.
Remove from heat, stir in tuna, thyme and reserve.
Butter a gratin has mold and cover the bottom with half the amount of cauliflower.
Cover with half the amount of the mixture of mushroom, tuna and cheese.
Finish with the rest of the cauliflower, and the rest of the mushroom, tuna and cheese.
Beat the eggs with a fork, lightly salt and pepper, and pour into the mold.
Bake in preheated oven at 180 degrees for 15 to 20 minutes.
http://www.bonoise-recettes.com/article-chou-fleur-au-thon-au-four-88450824.html