INGREDIENTS
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1 3- to 4-pound chuck roast
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salt to taste
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black pepper to taste
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2 Tbsp butter
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2 Tbsp canola oil
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2 cup beef broth
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2 Tbsp minced fresh rosemary
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1 jar pepperoncini
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12 buttered, toasted deli roll
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2 yellow onion, sliced and sautéed in 1 tablespoon butter until light golden brown