At the beginning of a white sauce always cook off the butter and flour over low heat for 1 minute to ensure the finished sauce doesn’t have a “floury” flavour. Remove from the heat before whisking in milk and returning back to the heat to thicken.
A great side dish for kids. Cut zucchini, carrot and red capsicum into thin sticks or rounds (snow peas are great too), then sauté in butter and garlic until tender and fragrant.