Add 18 new recipes and update index + lemon pasta

recipes/chocolate-lava-cake.json

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+{
+  "title": "Chocolate Lava Cake",
+  "tags": [
+    "Dessert"
+  ],
+  "servings": "4",
+  "prepTime": "15 mins",
+  "cookTime": "12 mins",
+  "description": "A molten chocolate centre that flows like actual lava when you cut into it. Dramatic, impressive, and takes exactly 12 minutes to bake. The dinner party flex of all time.",
+  "ingredients": [
+    "150g dark chocolate (70%), chopped",
+    "100g butter",
+    "2 eggs",
+    "2 egg yolks",
+    "80g caster sugar",
+    "30g plain flour",
+    "1 tablespoon cocoa powder, for dusting",
+    "1 teaspoon vanilla extract",
+    "1 pinch salt"
+  ],
+  "instructions": [
+    "Butter 4 ramekins generously and dust with cocoa powder, tapping out any excess. Pop them in the fridge while you make the batter.",
+    "Melt dark chocolate and butter together in a heatproof bowl over barely simmering water, stirring until smooth. Remove from heat and let cool slightly.",
+    "In a separate bowl whisk eggs, egg yolks, and caster sugar together until pale, thick, and ribbony — about 3-4 minutes. Add vanilla extract.",
+    "Pour the chocolate mixture into the egg mixture and fold gently. Sift in flour and salt and fold until just combined — do not overmix.",
+    "Divide batter evenly between the prepared ramekins. Refrigerate for up to 24 hours if prepping ahead.",
+    "Preheat oven to 200°C / 400°F. Bake for 10-12 minutes until the edges are set but the centre still has a wobble. Run a knife around the edge, place a plate on top, flip, and serve IMMEDIATELY."
+  ],
+  "id": "chocolate-lava-cake",
+  "updatedAt": "2026-03-12T10:00:00.000Z"
+}