Start by lightly greasing your 5″ ceramic dish, then scatter the small broccoli florets across the bottom. Keeping them small helps them cook fully during the short air frying time.
Crack the egg into a measuring cup or pitcher and add enough heavy cream until you reach about ½ cup total. Whisk to combine thoroughly. Seasoning after baking is advised for better texture.
Pour the egg-cream mixture evenly over the broccoli so the florets peek through. Then sprinkle the grated cheddar cheese on top. If your air fryer tends to brown cheese quickly, you can stir it into the custard instead.
Place the dish into your air fryer basket and set it to 325 °F (about 160 °C). Cook for around 10 minutes. If you like a creamier centre, you can check around 8-9 minutes; for firmer, cook a little longer.
Once done, the quiche should be lightly golden and puffed up. Add a pinch of salt, freshly cracked pepper, and some chopped parsley for a fresh pop of colour. Serve immediately and enjoy!