Cru Ovens Champion Outdoor Wood-Fired Pizza Oven - Cru Champion. Cru Champion. Countertop Pizza Ovens. We named this oven the Champion because it is the champion of all wood-fired ovens in terms of performance, size, quality, and value. The Cru Champion is handmade in Portugal with an oven chamber insulated by a 1 inch ceramic blanket sandwiched between two sheets of 1mm 304 stainless steel then encased in a 1.5MM lacquered aluminum outer shell. The robust design provides superior heat retention