Too late for this round but one of my go to with extra veggies, particularly something like butternut squash, is to cook it in with broth and then use an immersion blender to puree it all together. It makes a nice thick stew-like broth that my kids LOVE without the addition of more classic thickening ingredients like flour.
Today I made chicken bone broth in my IP. When it was done I added diced sweet potato, navy beans, a whole head of garlic (GREAT immune boosting) and a couple diced onions, cooked and then pureed it all together. Then of course added even more veggies that were not pureed. But the kids RAVE at the thicker consistency of the soup, while having no idea of the amazing immune boosting goodness they are eating.