Preheat your oven to 375 degrees.
In a small pot, over medium-low heat, add the olive oil, garlic, and onion. Sauté until softened.
Stir in the tomato puree and season with salt and pepper. Simmer for 30 minutes
Cook the rice in boiling water, 10 minutes shy of the suggested cooking time.
Drain the rice well and add to the sauce. Continue to cook the rice in the sauce until cooked through and most of the sauce is absorbed by the rice.
Stir in the grated cheese to the rice mixture.
Cut the tops of the peppers off, saving them to the side. Remove the seeds.
Season the inside of each pepper with a sprinkle of salt and pepper – don’t skip this step!
Stuff each pepper well with the rice filling. Using a couple of toothpicks secure the tops back onto the pepper.
Place all the stuffed peppers onto a baking sheet. Drizzle with a little olive oil, salt, and pepper.
Cook for about 30 minutes until the pepper is softened and lightly golden.
You can garnish it with a little extra grated cheese.