A tart for ember day

Ingredients

• 9 ounces (250 g) wholewheat or wholemeal pastry*
• 1-1/2 ounces (40 g) butter
• 6 ounces (150 g) onions, roughly chopped
• 12 fresh sage leaves, chopped or 1 Tablespoon of dried sage
• 3 ounces (75 g) well flavored cheese, grated
• 3 eggs
• salt and pepper
• 1/2 teaspoon ground cinnamon
• 1/2 teaspoon ginger
• 3/4 cup (180 ml) milk
• 1-1/2 ounces (40 g) raisins (optional)