This Onion Tarte Tatin is a fun way to make an onion tart, applying the traditional apple tarte tatin technique to onions. The idea is to cook the onions in a skillet on low heat, with the sweet flavors of honey and cinnamon, along with nutmeg, pepper, and balsamic vinegar to top it off. Then, the onions are covered with puff pastry, and baked in the oven, The result is a sweet upside-down onion tart.
All ingredients are easy to find with the exception of puff pastry (depending on where you live). Whole Foods generally carries high-quality puff pastry. You can also usually find the pepperidge farm or wewalka brand in local grocery stores. Puff pastry can also be ordered online.
Please note, this recipe is for a small 9-inch tart. If your pan is bigger, adjust ingredients accordingly.