Italian Sausage Zucchini Orzo

Bahan-bahan (3 porsi)

• 1 pound Italian sausage (spicy, mild or sweet)
• 1 small onion, diced
• 1 small zucchini, diced
• 4 cloves garlic, pressed or minced
• ½ teaspoon crushed red pepper flakes
• 1 cup uncooked orzo pasta
• 1 (14-ounce) can tomato sauce
• 1 ½ cups beef or chicken stock
• ⅓ cup heavy cream
• ½ cup chopped fresh basil
• ½ cup Parmesan cheese, plus extra for serving
• 3 ounces (about 2 large handfuls) fresh baby spinach
• fine sea salt and freshly-ground black pepper