Step 1

Preheat oven to 180C/350F.

Step 2

Mix Topping ingredients in a bowl with a pinch of salt and pepper. Set aside.

Step 3

Melt butter in a large pot over medium heat. Add garlic and cook for 1 minute until it smells incredible.

Step 4

Add flour and cook for 1 minute, stirring constantly.

Step 5

While whisking, slowly pour in half the milk. Once fully incorporated, whisk in the remaining milk plus the chicken broth.

Step 6

Cook for 4 to 5 minutes, whisking every now and then and more towards the end, until the sauce thickens so that it coats the back of a wooden spoon and when you draw your finger across it, the path stays (see video).

Step 7

Turn off heat, add cheeses, stir in (don't worry if it doesn't melt fully). Then do a taste test and add a bit of salt if required.

Step 8

Add broccoli and stir well to coat.

Step 9

Pour into a casserole dish, pat down to fill. Sprinkle over Topping, cover with foil then bake for 25 minutes.

Step 10

Remove foil and bake for a further 20 minutes until the topping is deep golden and the broccoli is tender.

Step 11

Stand for 5 minutes before serving.