Onions: Dickinson Frozen Foods is the premier IQF onion supplier in the United States. Our customer base is a virtual “Who’s Who” of American food processing and we supply most major food companies with IQF frozen onions. Potatoes: DFF's brand of Norsun award-winning culinary creations take America’s most popular vegetable to the next level. Whether you're looking for a standard IQF diced potato, or a specially-flavored roasted side-dish, our quality process ensures consistent texture, flavor, and color.