Reheat Baked Ziti in an Air Fryer

Doneness

The cheese top is golden-brown and bubbling at the ramekin edges during the last 90 seconds of uncovered cooking. Steam wisps rise from the pasta and sauce when the cheese cap is broken with a spoon. The penne is tender but not mushy. Pale or matte cheese means the centre needs more time; very dark or scorched cheese means the next batch should come off earlier.

Technique

Load straight from the fridge — no thaw, no preheat. Transfer the leftover portion to an oven-safe ceramic or glass ramekin if it is not already in one. Tent the ramekin loosely with a 6-inch square of heavy-duty aluminum foil bent over the rim — do not press it down, or it will stick to the soft cheese top mid-cook. Set 340 °F (171 °C) for 8 minutes with no flip. At the 5-minute mark, slide the basket out and remove the foil tent, then let it cook uncovered for the final 3 minutes so the cheese top browns. Probe the centre of the pasta and sauce mass horizontally with an instant-read thermometer — it must read at least 165 °F. If under, return uncovered for another 1–2 minutes and re-probe. Variants: 2-cup ramekin — 340 °F / 10 min, foil-cover 7 / uncover 3; crumbled loose leftover — 340 °F / 6 min, shake at 3, no foil; Stouffer's family-size portion transferred to a ramekin — 340 °F / 12 min, foil-cover 8 / uncover 4.

Watch out for

• !Probe the pasta-and-sauce centre to 165 °F before pulling — the cheese top browns to golden within 90 seconds of uncovering while the dense pasta-and-sauce interior can still read 130–140 °F. Insert the thermometer horizontally through the cheese top to the centre of the ramekin (about 1.5 inches deep) and do not touch the ramekin bottom, which reads hotter than the food. If under 165 °F, return uncovered for 1–2 minutes and re-probe. This temperature also meets the USDA guideline for reheating leftovers containing cooked meat.
• !Use a loose foil tent for the first stage: 5 minutes for a standard 1-cup portion, 7 minutes for a 2-cup ramekin, 8 minutes for Stouffer's family-size; then uncover for the final 3–4 minutes. Skipping the foil causes the cheese to scorch before the centre warms through. Tent loosely over the ramekin rim — pressing the foil against the cheese makes it tear the cheese cap off when removed. For crumbled loose leftovers, skip the foil entirely and shake at the 3-minute mark instead.
• !Do not exceed 350 °F. Penne-tube geometry has more exposed surface area than lasagna sheets, so it dries out faster at higher heat. At 350 °F the exposed penne ends at the top of the ramekin turn crunchy and overcooked before the centre reaches 165 °F. If your air fryer runs hot, drop to 330 °F and add 60–90 seconds.
• !Transfer ziti to an oven-safe ceramic or glass ramekin before loading. Cardboard takeout containers scorch at 340 °F within 90 seconds. The 9x13-inch casserole dish from the original cook is too large for most baskets. A standard 10-oz round ramekin is the right vessel for a single serving.