Authentic Carabaccia Recipe Tuscany, Italy

Name: Carabaccia
Prep time: 10 min
Cook time: 1 h 30 min
Yield: 4 servings
Cuisine: Italian
Ingredients: 1 kg (2.2 lbs) red onions, preferably cipolla de Certaldo, thinly sliced; 1 L (4 cups + 4 tsp) vegetable stock; 100g (4 oz) ground almonds; 2 tbsp wine vinegar; 2 tbsp honey or sugar; 4 slices of toasted bread; 2 tbsp olive oil; a pinch of cinnamon; a pinch of salt; a pinch of black pepper; 100g (4 oz) grated cheese, Pecorino Toscano or Parmigiano-Reggiano