Tomato, Sausage and Spinach Risotto

I'm sure we can all agree that risotto doesn't exactly photograph well. However, I can assure you that it tasted delicious. And while it isn't quite a one-pot meal, it does manage to squeeze in all four food groups. So I'd call that a success.

Tomato, Sausage and Spinach Risotto
1 can (28 ounces) diced tomatoes in juice
3 cups water
1 tablespoon olive oil
3/4 pound (350 g) spicy Italian sausage, casings removed and chopped
1 medium onion, finely chopped
Coarse salt and ground pepper
1 cup Arborio rice
1/2 cup dry white wine
About 7 cups flat-leaf spinach, chopped (I used an entire 225 g bag)
1/2 cup grated Parmesan cheese, plus more for serving (optional)
2 tablespoons butter

In a medium saucepan, combine tomatoes (with their juice) and 3 cups water. Bring just to a simmer; keep warm over low heat.

In a large saucepan, heat oil over medium. Add sausage and onion; season with salt and pepper. Cook until sausage is opaque and onion has softened, 3 to 5 minutes.

Add rice; cook, stirring until well coated, 1 to 2 minutes. Add wine; cook, stirring until absorbed, about 1 minute.

Add about 2 cups hot tomato mixture to rice; simmer over medium-low heat, stirring occasionally, until absorbed, 4 to 5 minutes. Continue adding tomato mixture, 1 cup at a time, waiting for one cup to be absorbed before adding the next, stirring occasionally, until rice is creamy and just tender, about 25 minutes total.

Remove pan from heat. Stir in spinach, Parmesan, and butter; season with salt and pepper. Serve immediately and sprinkle with additional Parmesan, if desired.