Creamy Italian Sausage Pasta - Miz En Place

Ingredients

• 1 pound Ground Italian Sausage
• 1 pound Penne pasta
• 1 tbsp Olive oil
• 1/2 Yellow Onion, Minced
• 2 Cloves Garlic, Minced
• 1/2 tsp Red Pepper Flakes
• 1/2 tsp Salt
• 2 cups Heavy Cream
• 5 ounces Baby Spinach
• 1 cup Shredded Parmesan Cheese