Onion & root vegetable upside-down pie - Trois fois par jour

Ingredients

• 1 200 g of flaky dough
• 2 tablespoons of butter
• 3 tablespoons of honey
• 2 tablespoons of white vinegar
• 5 to 6 small yellow onions, peeled and sliced in half
• 2 carrots, peeled and sliced in 2 cm pieces
• 1 parsnip, peeled and sliced in 2 cm pieces
• Salt & pepper, as preferred
• 1 goat cheese log, sliced (optional) Replacement options other cheese