1 ½ pounds brussels sprouts, stems trimmed and most of the sprouts sliced in half
3 tablespoons unsalted butter
3 tablespoons all-purpose flour
¾ teaspoon ground mustard powder
½ teaspoon cayenne pepper
2 cups whole milk
sea salt and fresh cracked black pepper
2 tablespoons olive oil
1 cup diced yellow onion (from one small onion)
8 cloves of garlic, smashed and peeled but left whole
1 cup coarsely grated smoked Gouda cheese
1 tablespoon cornstarch
1 cup coarsely grated aged Gouda cheese
2 tablespoons unsalted butter
½ cup panko bread crumbs
3 tablespoons fresh parsley
sea salt and fresh cracked black pepper