The key ingredients for a fruit pizza glaze are sugar and cornstarch. One recipe from Food.com includes orange and lemon juice in the glaze, while one from Better Homes and Gardens uses pineapple juice.
To make the fruit pizza glaze from Food.com, combine the ingredients in a saucepan and cook on low until the mixture thickens. The recipe from Better Homes and Gardens requires cooks to add the sugar and cornstarch to the saucepan, gradually pouring in pineapple juice while stirring until the glaze thickens and becomes bubbly. Both recipes suggest that cooks let the glaze cool for several hours in the refrigerator before putting it on the pizza.