While Corned Beef braises in the oven, cabbage wedges and potatoes are roasted for a full meal. A bonus recipe for the leftovers is included too!
Position oven racks in upper and lower thirds of oven. Heat oven to 350°F. Place Corned Beef Brisket in roasting pan; sprinkle garlic, contents of seasoning packet and peppercorns around and over brisket. Add water; cover tightly with aluminum foil. Braise in upper third of 350°F oven 3 to 3-1/2 hours or until brisket is fork-tender.
Meanwhile, place butter, green onions, horseradish, ground pepper and salt in glass measuring cup. Microwave on HIGH 1 to 2 minutes or until butter melts; mix well. Place cabbage wedges on 1 half of baking sheet and potatoes on other half. Drizzle remaining horseradish-butter mixture over vegetables, turning cabbage and tossing potatoes to coat. Cover with aluminum foil. Roast in lower third of 350°F oven with brisket 55 minutes. Uncover vegetables; continue roasting 15 to 20 minutes or until vegetables are tender and begin to brown.
Combine glaze ingredients in small bowl. Remove brisket from roasting pan; place on rack in broiler pan so surface of brisket is 3 to 4 inches from heat. Brush glaze over brisket; broil 2 to 3 minutes or until glaze is bubbly and beginning to brown.
Carve brisket diagonally across the grain into thin slices. Serve remaining brisket and potatoes with cabbage.