Wash, clean and slice the tomatoes. Drain mozzarella and cut into slices. Wash the rocket, dab dry and cut into small pieces. Roast the slices of bread in a toaster until golden brown.
Spread with 2 tablespoons of pesto. Cover with tomatoes and mozzarella. Sprinkle with 1 tablespoon of pesto. Place on a baking tray lined with baking paper. Bake in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for 5-8 minutes until the cheese has melted.
Sprinkle with rocket.