Portmeirion Botanic Garden Lasagna Dish. In 1972, Portmeirion Founder and Designer, Susan Williams-Ellis, created one of the worlds most popular dinnerware patterns, Botanic Garden. To this day this pattern continues to grow and thrive with new flowers, colors and shapes. The pattern has many rich floral motifs usually found in English gardens and are always enhanced with an Ivy border. These designs are used throughout the extensive collection of Dinnerware, Serve ware, Bake ware and Decorative items for the home. Watch your garden continue to grow with the 15.0′ x 11.0′ Lasagna Dish made of fine porcelain. Cook and Serve with this freezer safe, oven safe to 400 degrees, microwave safe and dishwasher safe lasagna dish.