Roast Beef with Tangy Mustard Sauce - Challenge Dairy

Ingredients

• 3½ to 4 pounds. beef sirloin tip roast (French Roll or Rolled Sirloin roast)
• 3 Tablespoons Dijon mustard
• 2 Tablespoons prepared horseradish
• 2 Tablespoons Challenge European Style Butter, softened
• 2 cloves garlic, minced
• 1 teaspoon dried thyme leaves
• ½ teaspoon dried tarragon leaves
• ½ teaspoon ground black pepper
• 3 Tablespoons Challenge European Style Butter
• 2 Tablespoons finely chopped onion
• 1 Tablespoon red wine vinegar
• 2 Tablespoons all-purpose flour
• 1 cup beef broth
• ½ cup red wine
• 2 Tablespoons Dijon mustard
• 1 teaspoon horseradish
• 1 teaspoon sugar
• 1 teaspoon salt