Cauliflower with Gruyere Sauce

Place cauliflower florets in a steamer basket over boiling water, cover and steam until tender, 8 to 10 minutes. (Alternatively, place florets in a microwave-safe bowl with 1/4 cup water, cover and microwave on High for 2 to 4 minutes.)

Meanwhile, whisk flour with 2 tablespoons milk until smooth. Heat the remaining milk in a saucepan over medium heat until steaming. Add the flour mixture; cook, whisking, until the sauce bubbles and thickens, 2 to 3 minutes. Remove from heat; stir in Gruyere, chives (or parsley), garlic, salt and pepper. Spoon over the cauliflower and serve.