Italian Style Spaghetti Squash (Vegetables with Love Italian-Style!)

A huge thank you to The South Beach Diet for this spaghetti squash dish that my kids will actually eat!  Here is the recipe:
                                                        Italian-Style Spaghetti Squash

Ingredients:
                1 pound spaghetti squash, halved lengthwise and seeded (I find the seeding is
                easier after cooking in the microwave)
                1 tablespoon of olive oil (or more as needed...)
                1/2 medium red onion, thinly sliced (we don't use this but you might)
                1/2 medium zucchini (we use a whole one or even one and a half), cut into
                       1/2 inch dice
                1 cup to 1 1/2 cup of cherry/grape tomatoes halved
                1/8 teaspoon salt (we don't use as it doesn't seem to need it, but you might want...)
                1/8 teaspoon pepper (again, we don't use this)
                1/4 cup reduced-fat grated parmesan cheese (per serving...)
                1/2 small lemon, sliced (or sprinkled on lemon juice to taste)
                We add one small clove garlic, chopped, to this recipe.