Ingredients
Method
- Preheat oven to 200°C / 180°C fan / Gas 6. Spread vegetables in single layer across 2 roasting trays. Drizzle with oil, sprinkle oregano, season. Roast 30–35 minutes until tender and slightly charred. Cool slightly.
- Cook onion in oil 8 minutes. Add garlic — 2 minutes. Add tomatoes, purée, sugar, and herbs. Season. Simmer 20 minutes. Stir in roasted vegetables.
- Melt butter. Add flour — stir 2 minutes. Add milk gradually, whisking. Cook until thickened. Add nutmeg and seasoning.
- Reduce oven to 180°C / 160°C fan / Gas 4. Spread thin béchamel on dish base. Layer: pasta, half vegetable sauce, third béchamel, Parmesan. Repeat. Final layer: pasta, remaining béchamel, Parmesan, mozzarella if using.
- Bake 35–40 minutes until golden and bubbling. Rest 10 minutes before serving.
Notes
Roast vegetables in a single layer on two trays — never crowd them.
Season the tomato sauce boldly — it is diluted by the béchamel during baking.
Start and finish with béchamel for the best structure and top.
Rest 10 minutes before serving for clean, neat portions.
Can be assembled 24 hours ahead and refrigerated before baking.
Freezes well before or after baking for up to 3 months.
