Step 1

Preheat oven to 200°C.

Step 2

Heat half the oil in a large frying pan over medium-high heat; cook onion, stirring, for 15 minutes or until onion caramelises. Add rosemary; cook, stirring, for 1 minute or until fragrant.

Step 3

Whisk eggs, milk and half the cheese in a large jug. Combine onion, ham and almonds in a medium bowl. Layer bread and ham mixture among four 2 cup (500ml) ovenproof dishes. Pour over egg mixture; sprinkle with remaining cheese. Stand for 20 minutes.

Step 4

Bake for 35 minutes or until just set, golden and puffed.

Step 5

Meanwhile, cut tomatoes into four clusters; place on an oven tray, drizzle with remaining oil. Roast for the last 10 minutes of strata cooking time or until skins start to split.

Step 6

Serve strata topped with tomatoes and basil.