Quantity   Component name
1 × Pizza Oven! Purchased for $7 on auction from my university. Simple pizza oven that by default only has settings to enable one or both heating elements and a timer. No temperature control built in.
1 × REX-C100 Knockoff PID Temperature Controller Purchased from ebay for ~$20
1 × K-Type Thermocouple The one I purchased ($10 for 5 of them on ebay) is rated to 500C. Could likely use one that's rated to 300C or so too.
1 × 15A Relay The relay inside the temperature controller is only 3A rated... and this is a 1450W oven! No way a 3A relay will cut it. 15A will give us up to 1800W, absolutely plenty for our purposes.