Freshly ground black pepper to taste
Preheat oven to 350 degrees. Spread walnuts and pine nuts in a baking pan and bake 8 to 10 minutes, stirring occasionally, until golden brown. Remove from oven and set aside. In a steamer over rapidly boiling water, steam zucchini (or yellow squash) until they can be pierced with a knife, about 6 to 8 minutes (be careful not to get them too soft). Remove from steamer, halve lengthwise and scoop out flesh (transfer flesh to a strainer or colander, strain out excess liquid, chop flesh then reserve), being careful not to get the shells too thin. Reserve shells. In a skillet over low heat, warm olive oil. Add onions and cook, covered, until soft. Add garlic and mushrooms, cover and cook until mushrooms are soft. Add chopped tomato and reserved squash flesh and cook, covered, for 3 to 4 minutes. Uncover, increase heat to medium and cook, stirring rapidly, until mixture is almost dry. Add parsley, oregano, nutmeg, lemon juice and pepper and mix well. Increase oven temperature to 375 degrees. Spoon mixture into squash shells and place in a parchment paper-lined baking pan. Bake for 20 minutes. Remove from oven and serve immediately.
Calories per serving: 315 for original recipe, 130 for revised recipe.
Cholesterol per serving: 5 mg for original recipe; 0 mg for revised recipe.
Fat per serving: 28 mg for original recipe; 9 mg. for revised recipe.