Preheat Oven to 350°F / 175°C
Prepare the pepper by removing the top and the white membrane and the seeds. Brush them with a little bit of olive oil and salt. Bake in a lasagna type pan in the preheated oven for about 15/20 minutes. When they come out of the oven be sure to pour the water that has accumulate inside in the bottom of the lasagna pan.
Heat a sauté pan to medium heat, add the sausage and sauté them until golden brown. Drain the sausage and keep the fat in the pan.
Add the onion and sauté them until golden brown. Add the mushrooms, salt, and sauté until they release all their water.
Add the spinach and when wilted add the garlic and when fragrant add the tomatoes. Adjust seasoning with salt and pepper as needed and cook for 20 minutes. Add the basil and mix well.
In a large bowl, add the rice and the sausage mixture above and mix well.
Stuff each pepper with that mixture and be sure to pack them tight. And bake them for about 20 minutes. Add the cheese on top and bake until the cheese is nicely melted.
