Preheat the oven to 350°F (180°C).
Heat the olive oil in a frying pan and sauté the ground beef for 3-5 minutes over high heat, seasoning with salt, pepper, garlic powder, paprika, and dried basil. Add the crushed tomatoes and cook for another minute.
Remove from the heat and mix in the grated cauliflower. Stir to incorporate into the mixture.
Halve the bell peppers lengthwise or alternatively cut off the tops of the peppers to make cups. Remove the seeds, arrange them on a baking pan, and stuff the peppers with the ground beef mixture.
Top with the cheese and add some water (about half a cup) to the pan to ensure the peppers remain moist while baking in the oven.
Bake for 25-30 minutes until the peppers are tender, adding more water to the pan if needed. Serve hot.