To make the meatballs, combine the hamburger and sausage. Add the bread crumbs, salt and pepper, the spinach and egg. Mix thoroughly and form into large meatballs. Saute in a little oil until browned on all sides. Set aside.

For soup, bring the water, bouillon cubes, kidney beans, tomatoes, oregano and basil to a slow boil, mashing the tomatoes with the back of a wooden spoon. Simmer 10 minutes and add the celery and carrots. Bring back to a boil and simmer 10 more minutes. The add the mostaccioli and meatballs and boil another 10 minutes. Let cool 15 minutes (pasta will absorb a lot of the liquid). Serve with freshly-grated Parmesan cheese, a salad and hearty bread, such as the cabbage patch bread.