1. Bring a large pot of salted water to a boil over high heat; cook spaghetti until tender (about 12 minutes). Drain thoroughly. Peel carrots. Cut carrots and green and yellow zucchini into long, thin julienne strips (about 1/8 inch thick) to resemble spaghetti.

2. In a Dutch oven or large skillet, heat oil and butter over low heat. Add garlic and carrots. Saute for 5 to 7 minutes. Add spaghetti, green and yellow zucchini, basil, parsley, chives, marjoram, and salt. Stir to combine and cook for 4 to 5 minutes. Remove from heat and place in a shallow serving bowl. Sprinkle with Parmesan cheese. Toss to combine. Serve immediately.