One-Pot Spinach, Chicken Sausage & Feta Pasta

Ingredients

• tablespoons olive oil
• links cooked chicken sausage , sliced into rounds
• diced onion
• garlic, minced
• can no-salt-added tomato sauce
• lightly packed baby spinach
• cooked whole-wheat rotini pasta
• chopped pitted Kalamata olives
• finely crumbled feta cheese
• chopped fresh basil