• You must halve the recipe for a 3-quart cooker.
• The sauce is thin. If desired, transfer the meatballs to a serving platter, then stir 1/4 cup tomato paste into the sauce and use the SAUTÉ function at MEDIUM, NORMAL, or CUSTOM 300°F to reduce and thicken the sauce, stirring often, 2 to 3 minutes.
• For more flavor, brown the meatballs before cooking them in the pot on a lipped baking sheet in a 350°F oven for 10 minutes, turning occasionally. (They are fragile—turn gently.)
• Grate lots of Parmigiano-Reggiano over the servings, and/or drizzle with balsamic vinegar.