Combine chopped vegetables, jalapeño, vinegar, oil, 3 minced garlic cloves, 1/2 teaspoon oregano, sugar, salt and pepper in medium nonreactive saucepan. Bring to a boil; reduce heat and simmer 5 to 6 minutes or until vegetables are crisp-tender, stirring occasionally. Remove from saucepan; set aside.
Deli Roast Beef:
Combine broth, remaining 3 garlic cloves and 1/2 teaspoon oregano in same saucepan. Bring to a boil; reduce heat and simmer 5 minutes to blend flavors. Remove broth from heat and immediately add roast beef; stir. Let stand 5 minutes until heated through.
Drain vegetables. Drizzle 1 tablespoon broth mixture over roll bottoms. Place 1 slice cheese on bottom half of each roll. Using tongs, divide beef evenly over cheese. Top evenly with vegetables. Close sandwiches. Serve with remaining broth on the side.
Nutrition information per serving: 504 Calories; 207 kcal Calories from fat; 23 g Total Fat; 8 g Saturated Fat; 9 g Monounsaturated Fat; 80 mg Cholesterol; 911 mg Sodium; 38 g Total Carbohydrate; 2.8 g Dietary Fiber; 36 g Protein; 4 mg Iron; 10.5 mg Niacin; 0.5 mg Vitamin B6; 3.1 mcg Vitamin B12; 6.6 mg Zinc; 36.9 mcg Selenium; 97.8 mg Choline;