Fresh Vegetable Mélange

1½ teaspoons vegetable oil
1½ cups sliced onion, separated into rings
1 cup red bell pepper strips
2 cloves garlic, minced 
1¾ cups sliced yellow squash
1¾ cups sliced zucchini
1 cup chopped, unpeeled plum tomatoes
1 tablespoon julienned fresh basil
½ teaspoon lemon pepper
¼ teaspoon salt (omit if on a low-sodium diet)
1 tablespoon grated Parmesan cheese 

Heat oil in a large nonstick skillet over medium-high heat. Add onion, bell pepper, and garlic; stir-fry for 2 minutes. Add squash and zucchini; stir-fry for 3 more minutes, or until the vegetables are crisp-tender. Add tomatoes, basil, lemon pepper, and salt; cook for 1 minute, or until thoroughly heated. Sprinkle with cheese before serving.
Makes 4 servings.