This idea comes from my sister-in-law Joelle. She has spaghetti once a week. Each time she makes the sauce, she starts with some canned tomatoes, onion, garlic and herbs, and then she adds some extra veggies, like steamed cauliflower and broccoli, or fresh spinach and carrots. After her 5 kids are done eating their spaghetti, they get to guess what the surprised veggies were. They love guessing, and love the taste of the pureed up veggies. I am definitely trying this next week! (we had spaghetti stoup last night, another recipe I got from Joelle).
Canned Crushed tomatoes
Herbs (I am guessing basil, oregano, crushed red pepper . . .)
Blend it all up in your blender. Then add a couple of bonus veggies and blend it up too. Heat the sauce on the stove top for a few minutes, and you are done.