Cheesy bean bake

oil

onion, (diced)

garlic, (minced)

(~ 2/3 cup) arborio rice

(~ 2 1/2 cups) vegetable stock

x 400g tins of beans, (drained (240g, or ~ 1 1/4 cups, each when drained) - I used haricot beans, cannellini beans and black beans)

x 400g tins of chopped tomatoes ((~ 2 2/3 cups in total))

tomato puree

cheddar cheese, (grated (~ 2 cups when grated))

Black pepper