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1
In a 6-qt. stockpot, heat 3 tablespoons oil over medium-high heat; brown roast on all sides. Sprinkle with 2 teaspoons each salt and pepper. Transfer to a 6-qt. slow cooker.
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2
Add onions to stockpot; cook and stir until lightly browned, 2-3 minutes Add garlic; cook 30 seconds longer. Add wine; cook 3-5 minutes, stirring to loosen browned bits from pan. Stir in stock, thyme, Italian seasoning and pepper flakes; transfer to slow cooker. Cook, covered, on low until beef is tender, 7-9 hours.
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3
About 1/2 hour before serving, preheat oven to 350u00b0. Place peppers in a 15x10x1-in. baking pan. Drizzle with remaining oil. Sprinkle with garlic powder and the remaining salt and pepper; toss to coat. Roast until softened, 15-20 minutes, stirring halfway.
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4
Remove roast; cool slightly. Strain cooking juices into a small saucepan, reserving strained mixture and removing thyme stems. Skim fat from juices; heat through and keep warm. Coarsely shred beef with 2 forks; stir in reserved strained mixture. If desired, moisten beef with some of the cooking juices.
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5
To serve, preheat broiler. Arrange buns on
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6
, cut side up. Broil 3-4 inches from heat until lightly toasted. Remove from oven; top each bun with 2/3 cup beef mixture and 1 slice cheese. Broil until cheese is melted, about 30 seconds.
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7
Top with peppers and, if desired, giardiniera. Serve with cooking juices for dipping.
