Artichoke pizza

30 cm (12 inch) ready-made pizza base

6 canned artichoke hearts, drained

handful of black olives

6 strips of baked, smoked tofu

125 g (4 oz) reduced-fat Cheddar or other hard cheese, grated (optional)

1 onion, chopped (for Topping)

2 garlic cloves, chopped (for Topping)

1 teaspoon chopped oregano (for Topping)

1 green pepper, cored, deseeded and chopped (for Topping)

1 red pepper, cored, deseeded and chopped (for Topping)

1 carrot, grated (for Topping)

1 tablespoon olive oil (for Topping)

1 tablespoon balsamic vinegar (for Topping)

6 mushrooms, sliced (for Topping)

Tomato topping

400g can tomatoes