Make this recipe a recipe that people in that category can eat. categories: ['low_calorie'], recipe: cut onion into thin slices. cook onions in the butter on medium low heat for about 15 minutes. add the sugar and cook for about 5 more minutes. spread each shell with a little olive oil, especially the edges. spread pesto sauce on each pizza shell. top with onions. top with cheese. bake for about 9 minutes, or until the cheese melts and the pizza is warmed through.

Target recipe: in a 8-quart dutch oven or heavy pot, melt butter over medium-high heat. add onions and salt. cook, stirring often, until softened and just beginning to brown, about 35 minutes. reduce heat to medium. add sugar and cook, stirring often to scrape up any browned bits on the bottom of the pot, 35-40 minutes. lower the heat if the bottom of the pot begins to scorch. when done, onions should be deep golden brown and have a jam-like consistency. remove from heat, season with salt. let cool completely before packaging in an airtight container.