Ingredients

• 1/4 cup olive or vegetable oil
• 2 tablespoons cider or red wine vinegar
• 2 garlic cloves, minced 3/4 teaspoon salt
• 1/4 teaspoon pepper
• 2 cups chopped cooked roast beef
• 1 medium onion, sliced
• 1 medium green or sweet red pepper, julienned
• 1 cup sliced mushrooms
• 1 (1 pound) loaf frozen bread dough, thawed