Heat oven to 200C/180C fan/gas 6.
Tip the onions, garlic, peppers and
olive oil into a roasting tin and cook
for 40-45 mins, stirring occasionally,
until the onions and peppers are soft
and tinged brown. Stir in the olives
and capers, and season well.
While the onions are cooking, make
up the pizza dough following pack
instructions. Roll and press the dough
out to fit a baking tray, about 40 x 30cm.
Leave to rise in the tray for 10 mins,
then spoon over the topping mix.
Press gently into the dough and leave
for another 10 mins. Scatter over the
anchovies, if using.
Bake for 25-30 mins or until the dough
has risen and cooked through. Drizzle
with more olive oil to serve if you like.