Your homemade food should contain 1/2 to 1 cup of cooked vegetables per 20 pounds of your dog's weight per day, if you choose to add them. (dogcare.dailypuppy.com)
You may vary the dish with grated carrot or perhaps a bit of minced red bell pepper for color — or any other leftover cooked vegetables in the refrigerator. (vegetariantimes.com)
Also, you can actually replace part or all of the beans in a hummus with cooked vegetables for really interesting — in a good way, I promise! (organicauthority.com)