Iris, a little while ago I posted
this recipe in the recipes thread when I needed to use up a buttercup squash. I made a multigrain pilaf that used quinoa, bulgur, and rice, but you could easily swap it to be quinoa and barley. Winter squash is probably cheap right now and you can use any variety. I also used apples in the recipe.
Other than that, I'd say you can probably find a recipe somewhere for either muffins or pancakes that uses oats and buttermilk.
Another option would be a vegetable soup.
Here is my recipe for "minestrone" soup, but it's pretty flexible. You could easily swap out the pasta for barley and add zucchini, broccoli, and celery (or even eggplant, but I hate eggplant
).
Or you could make a pilaf with barley or quinoa and add zucchini. Saute some onions and zucchini, then add broth and the grain and cook until it's done (or if you're worried about zucchini getting mushy, take it out and add back in). I like to use seasoning blends like italian seasoning or greek seasoning. Myrecipes.com has a feature now where after you do a keyword search, you can narrow it down by price per serving (at least for recipes where that info was made available).