In a large skillet, melt the butter over medium heat.
Add the chopped onion and minced garlic, and sauté for 3 minutes until softened.
Stir in the Arborio rice and cook, stirring constantly, until the rice is coated with butter.
Pour in the tomato or herb broth and bring to a simmer over medium-high heat, stirring constantly.
Reduce the heat to low and cook the rice, stirring occasionally, for about 15 minutes until it is tender and creamy.
Gradually add the baby spinach to the risotto, stirring until wilted after each addition.
Once the spinach is wilted, add the tomato wedges to the skillet and stir to combine.
Continue cooking the risotto gently for another 8 minutes until the tomatoes are heated through.
Season the risotto with pepper to taste and distribute the tuna over the top.
Serve the risotto hot, with grated Parmesan cheese on the side.
Notes / Tips / Wine Advice:
Wine Advice:
Pair this dish with a light-bodied white wine such as Sauvignon Blanc or Pinot Grigio to complement the freshness of the spinach and tomatoes and the richness of the tuna.