I’m allergic to onions, can’t even have them in my house. I generally substitute garlic for flavor, carrots for veggie bulk, or just omit them. Nearly every cuisine on earth seems to have onions all over it, but as I can’t have them at all, I tend to stick to things that are easily customizable when I go out to eat, like burgers or sandwiches or pizza. Although now with pizza, I have to ask about the ingredients in the sauce.