Preheat your oven to 190°C (170°C fan). While it heats, bring a large pot of salted water to a gentle boil. Carefully cut the tops off each pepper — about 1 cm from the stem — and set the tops aside. Scoop out the seeds and white membranes with a small spoon, keeping the peppers intact. Lower the peppers into the boiling water for exactly 4 minutes. You'll notice the skins brighten to a vivid scarlet and soften just slightly, but they should still hold their shape firmly. Drain them upside down on a clean tea towel to remove any excess moisture.

Heat the olive oil in a large frying pan over medium-high heat. Once the oil shimmers and a small piece of onion sizzles on contact, add the diced onion. Cook for 4–5 minutes, stirring occasionally, until the onion turns translucent and releases a sweet, fragrant aroma. The edges should be just beginning to brown — that's the flavour building.

Add the minced garlic and grated courgette to the pan. Stir everything together and cook for another 2–3 minutes. The courgette will release its moisture, and you'll hear a gentle hiss as it hits the hot pan. Once the pan is nearly dry and the courgette looks matte, it's ready. This step prevents a soggy filling later.

Add the turkey mince, breaking it apart with a wooden spoon. Cook for 6–8 minutes, stirring frequently. You'll see the pink flesh turn to a pale golden brown, and the sizzling sound will become more pronounced as the moisture cooks off. The mince should be fully cooked through and slightly crumbly, with no visible pink spots. If you notice any liquid pooling, keep cooking until it evaporates — this concentrate of flavour is vital.

Stir in the cauliflower rice, chopped tomatoes, oregano, smoked paprika, cumin, and a generous pinch of salt and pepper. Reduce the heat to medium and let the mixture simmer for 5 minutes. The sauce will thicken noticeably, turning a deep, rich red, and the cauliflower rice will absorb the tomato flavour. The aroma at this point is deeply savoury and slightly smoky — a promise of what's to come. Taste and adjust the seasoning.

Stand the blanched peppers upright in a baking dish. If they wobble, you can trim a sliver off the bottom — just don't cut through the base. Spoon the turkey filling into each pepper, pressing gently with the back of the spoon to pack it in. Mound the filling slightly above the rim; it looks more generous and rustic that way. If using cheese, sprinkle it over the tops now. Place the pepper tops back on at a slight angle, as if they're just resting there, which creates a lovely visual reveal at the table.

Bake for 25–30 minutes. The peppers should be tender when pierced with a fork, and the cheese (if used) will be bubbly and golden in patches. The filling will be piping hot, and the edges of the peppers will have a slight char in spots — that's the sign of a perfect roast. Remove from the oven and let them rest for 5 full minutes. This rest time is crucial: it lets the filling set so it doesn't spill out when you cut into them.

Transfer each pepper to a serving plate using a wide spatula. Spoon any pan juices over the top — this is liquid gold. Garnish generously with fresh parsley or basil, which adds a bright green contrast against the red pepper. Serve immediately, watching the steam curl up as you cut into that first pepper.