1.Preheat oven to 180°C (160°C fan forced).
2.Make broccoli filling. Boil, steam or microwave broccoli until tender, drain. Heat butter in medium saucepan, cook onion, stirring, over medium heat, 1 minute. Stir in flour, cook, stirring, 1 minute. Remove from heat, gradually stir in combined milk, cream and nutmeg, stir over high heat until mixture boils and thickens. Stir in broccoli.
3.Divide filling between crêpes; fold crêpes into triangles.
4.Place crêpes in oiled ovenproof dish, sprinkle with cheese. Bake crêpes, in oven, about 10 minutes or until cheese has melted and crêpes and filling are heated through.