Butternut Squash Caramelized Onion Galette Recipe | Easy Galette

Ingredients

• 315g plain flour (including 150g wholemeal flour if you like), plus more for work surface
• ½ tsp table salt
• 225g unsalted butter, diced
• 120g soured cream or full-fat Greek yogurt (i.e a strained yogurt)
• 1 tbsp white wine vinegar
• 80ml ice water
• 2 small or 1 large butternut squash (about 1.25kg)
• 3 tbsp olive oil
• 1 ½ tsp table salt
• freshly ground pepper
• 15g butter
• 2 large sweet onions, such as Spanish or Vidalia, halved, thinly sliced in half-moons
• ¼ tsp sugar
• ¼ tsp cayenne pepper, or to taste (optional)
• 185g grated Italian fontina cheese
• 1 tsp chopped fresh thyme or 2 teaspoons chopped fresh sage
• 1 egg yolk beaten with 1 teaspoon water, for glaze (optional, but makes for a croissant-looking finish)