Zucchini Pasta

4 medium zucchini, 2 T butter, plus more if desired, 2 T olive oil, plus more if desired, ¼

3 cloves garlic, minced, 1 onion, chopped, 3 T olive oil, 1 pound Italian sausage, casings

½ pound of pancetta, chopped into a ¼, 3 large leeks, sliced in half and then sliced into h