1 pound young, glossy zucchini
3 medium carrots
2 tablespoons butter, plus 1 tablespoons for tossing with the pasta
1 tablespoon rice bran oil
1 cup onion - chopped
sea salt
1 tablespoon fresh marjoram, or 2 tablespoons dried marjoram
1/8 teaspoon chili pepper - chopped
1 cup parmigiano-reggiano cheese - freshly grated