Cauliflower And Broccoli Gratin - cooking recipe

Ingredients

4 tbsp butter
1 cup fresh breadcrumbs
2 lb broccoli and cauliflower florets
2 cups sliced fennel bulb
1/4 cup flour
2 cups milk
1/2 None small Spanish onion, thinly sliced
1 cup grated Gruyere cheese
1/3 cup grated Parmesan Reggiano cheese

Preparation

Preheat oven to 350\u00b0F. Grease a baking dish.
In a large frying pan, melt 2 tbsp butter over medium heat. Cook breadcrumbs for 2 mins, or until lightly toasted.
Meanwhile, blanch broccoli, cauliflower and fennel in boiling salted water for 2 mins. Shock in ice water then drain.
Melt remaining butter in a large frying pan. Cook flour until fragrant and nutty, around 1-2 mins. Slowly whisk in milk. Bring to a boil then reduce heat and add onion. Simmer, stirring frequently, until mixture thickens, around 8 mins. Stir in cheese until blended. Season. Fold in blanched vegetables then transfer to prepared dish. Sprinkle with breadcrumbs and bake for 30 mins.