French Onion Toasts

Name: French Onion Toasts
Prep time: 25 min
Cook time: 10 min
Total time: 35 min
Cuisine: European, Mediterranean, French
Ingredients: 1 tablespoon butter; 2 cups chopped onions; 2 tablespoons chopped fresh rosemary or 1 teaspoon dried rosemary, crushed; 1/4 teaspoon salt; 1/4 teaspoon fresh ground black pepper; 12 slices French baguettes, 1/2 inch thick (2 to 3 inches in diameter); 1 -2 tablespoon butter (softened for spreading); 1 1/2 cups grated swiss cheese