1 1/2 pounds Brussels sprouts
3 tbsp. olive oil
1 cup apple cider or apple juice
4 tbsp. Earth Balance margarine
1 tsp. Dijon mustard
1/4 to 1/2 tsp. salt
1 tbsp. all-purpose flour
Trim the ends off of the Brussels sprouts, remove loose and blemished leaves and then halve.
Heat the oil in a very large saute pan, allowing the pan to get really hot, but not smoking. Place the Brussels sprouts in, cut side down and let them cook for 1 to 2 minutes until seared with some color but not cooked through. Turn down the heat to medium low, add the apple cider and cover. Cook for 4 minutes, or until just tender; a knife inserted in the stem should go in with a little resistance, and the Brussels sprouts should be bright green. Remove them from the pan with a slotted spoon and place them into a large bowl, leaving the liquid behind in the pan. If a couple of stray leaves remain that's fine.
Turn down the heat a bit more and add the margarine, mustard and salt. When the margarine is melted, sprinkle in the flour and whisk until smooth. If the pan is too hot when you add the flour, you'll get a lumpy sauce no matter what, because the flour cooks and forms lumps instead of disolving. Turn up the heat and keep whisking until the sauce is thickened, another couple of seconds. Pour the sauce over sprouts, toss and serve immediately.