Crostone with Onions and Apples

Method

1. Slice white onion abundantly and soak in water to reduce pungency.
2. Bring water to a boil with salt and vinegar, then blanch the onion slices together with apple peels.
3. In a pan with abundant oil, stew the apple peels and onion. Add salt and sugar, and cook on very low heat for about 40 minutes.
4. Cut thick slices of bread for the crostone and coat generously with extra virgin olive oil.
5. Toast the bread slices in a pan on both sides until golden brown.
6. When the onions are almost done, add a little lemon juice.
7. Serve the stewed onions on the crispy bread.