Place breads on baking trays and spread with tomato salsa. Top evenly with beans, capsicum and cheese. Sprinkle with chilli powder.
Bake in a preheated 220 °C oven (fan-forced) for 10-12 minutes, until bread is crisp and topping is lightly browned.
Meanwhile, mash avocado in a small bowl. Stir in shallots, lime juice and chopped coriander.
To serve, dollop avocado over pizzas. Sprinkle with tomato and extra coriander leaves.