Mushroom and Sausage Risotto

This is an oddball kind of a recipe which came about when I was trying to think how to make risotto acceptable to Ms B, aka Ms Feed-Me-MEAT! Sausages were the only thing I had in the freezer (boiling them first makes them easier to cut up).

1 onion
1 cup diced mushrooms*
2 tsp minced garlic
1 1/2 cup Arborio rice
boiling water
2 sausages, lightly boiled and sliced
1 tin diced tomatoes
1 tsp basil
1 cup grated cheese**
black pepper and salt to taste

For onion-phobic people like B, whizz up the onion in a blender with 1/2 cup of warm water. Otherwise, just dice it, and saute until translucent. Saute mushrooms until soft, then add garlic and cook until fragrant. Add Arborio rice, and about 1/2 cup boiling water (or onion water), adding more as rice absorbs the moisture. Add sausage, tomato and basil after the rice has cooked for a while. Keep adding water until rice has a nutty texture. Stir in cheese, adding more water if necessary, and then season and serve as soon as cheese is melted through. Give the Eldest Daughter twice as much as she originally asked for because she likes it That Much.

* I would have put in more but I ran out; I'd love to use dried mushrooms to increase the flavour as well.
** I usually use 1.3 cup Parmesan but didn't have any in the fridge.