INSTRUCTIONS
1. Preheat an air fryer to 400 °F.
2. Combine ground beef, onion, bread crumbs, thyme, egg, salt, and pepper in a bowl. Knead and mix thoroughly. Transfer mixture to a small loaf pan. Smooth the top, press in mushrooms, and coat with olive oil.
3. Roast meatloaf in the preheated air fryer until nicely browned, about 15-20 minutes. An instant-read thermometer inserted into the center should read at least 165 °F.
4. Let meatloaf rest at least 10 minutes before slicing into wedges and serving.