Oh, well. As I read on one web site, when you have to restrict your oxalic acid intake, "white food is your friend." So until I can get myself educated on how to cook healthy, vegetarian, low oxalic acid meals, we'll be eating a lot of cauliflower, cheese, and rice.
Here is a recipe for a cauliflower sandwich spread that I've been making for years, which fits our requirements exactly and is delicious to boot.
Break one small head of cauliflower into flowerlets and steam until very tender. Put florets into a large bowl and mash with a potato masher. Add 1/8 cup of mayonnaise, 2 tablespoons of Dijon mustard, salt and pepper to taste. Spread the filling over one piece of lightly buttered toast and serve open faced. (I like to use a light onion rye for my toast. I also enjoy a few sauteed onions on the sandwich.)