In skillet, heat oil over medium high heat. Add potatoes, onion and green beans. Sauté for 5 minutes, turning frequently.
Add remaining vegetables, garlic, salt and rosemary.
Add tuna, including the flavored juices. Cook mixture, stirring gently, until vegetables are tender, approximately 8-10 minutes. Serve from skillet and garnish plates with sprig of rosemary. Serve with French rolls or garlic bread if desired.
Note: Frozen vegetables may be substituted for ease of preparation and seasonal availability.
Nutrition Information for one serving (433 grams): Calories 340 (160 from Fat), Fat 18 grams (Saturated 2.5 grams), Cholesterol 20 mg, Sodium 350 mg, Total Carbohydrates 31 grams, Fiber 7 grams, Sugars 9 grams, Protein 18 grams.