Lightly brown the sausage meat in a skillet, then do the same with the ground meat.
250 g sausage meat, 250 g ground meat
Transfer both meats to a mixing bowl.
Peel and finely chop the onion and garlic.
1 onion, 1 clove garlic
Add half the onion, the garlic, the salt, the pepper, and a little parsley, then mix until the stuffing is evenly combined.
fresh parsley, 1 pinch salt, 1 pinch pepper
Assemble
Slice the tops off the tomatoes. Scoop out the flesh with a spoon and reserve it, then season the insides with salt and pepper.
4 tomatoes
Fill the tomatoes with the stuffing, packing it in firmly, then replace the tops.
Arrange the tomatoes in an air fryer-safe dish, leaving a little space between them. Scatter the remaining onion and the reserved tomato flesh around them, sprinkle with thyme, and top each tomato with a small knob of butter.
fresh thyme, 1 knob butter
Cook in the air fryer
Preheat the air fryer to 160 °C.
Place the dish in the basket and cook for 40 to 45 minutes at 160 °C.
Check that the tomatoes are tender and the stuffing is golden on top.
Finish
Remove the dish and let it rest for a few minutes before serving, ideally 5 minutes.
Serve with rice, pasta, or a green salad.
Notes
Choose very firm tomatoes, ideally slightly underripe, so they hold their shape better during cooking.
After hollowing out the tomatoes, salt the insides and place them upside down on paper towels for 10 minutes to draw out excess moisture.
Pre-cooking the meats in a skillet is essential: it gives you a flavorful stuffing that cooks through without overcooking the tomatoes.
Use a dish that fits inside the basket with space for air to circulate all around it (glass, ceramic, or an aluminum tray that can withstand 200 °C), and check the height so it doesn't touch the heating element.
For a quicker variation, cook at 180 °C for about 25 minutes (depending on the size of the tomatoes) for a more deeply browned stuffing and firmer tomatoes.
For a gratinéed top, sprinkle the stuffing with a little breadcrumbs or Parmesan (the butter helps it brown nicely).
Storage: 2 to 3 days in the refrigerator or up to 2 months in the freezer. Reheating: 3 to 5 minutes at 180 °C (from the fridge) or 10 to 12 minutes at 160 °C (from frozen), covering with aluminum foil at first.