1. Place your sliced onions into a skillet with a little bit of olive oil, salt, pepper and saute them until they are nicely caramelized. Set them aside when done.
2. Arrange your sliced baguette's onto a baking sheet.
3. Place the sliced Roma Tomatoes on top of baguettes.
4. Now place the caramelized onions on top of the tomatoes.
5. Sprinkle a little bit of Thyme onto the onions.
6. Now the Swiss Cheese on top.
7. Place 1 Sage leaf on top of the Swiss Cheese.
8. Drizzle Olive Oil over all of the assembled baguettes.
9. Bake in preheated 350 degree oven for 8-10 minutes until cheese is brown and bubbly or place under broiler for a few minutes.
10. When done sprinkle a little salt and pepper over it all and enjoy.