Preheat oven to 325 degrees (or prepare grill)
Wash brussels sprouts and drain. Cut off tough end. If they are not very small, cut in half.
Place sprouts on baking tray in a single layer. Drizzle with olive oil and seasonings, using hands to coat them well. (If roasting on grill, place in grill basket or thread onto skewers).
Roast in 325 oven for about 30-40 minutes, until they are crispy and golden brown on the outside. Turn once through cooking. (If roasting on grill, cook on medium heat and close lid or cover).
May optionally grate a little Parmesan cheese on top.