Sweet Sausage and Mushroom Rigatoni - Sprinkles & Sea Salt

Ingredients

• 2 tbsp unsalted butter
• 2 cups yellow onion, thinly sliced
• 1 tbsp sherry (optional)
• 1/2 tsp salt
• 1 lb ground, sweet Italian sausage
• 4 large cloves fresh garlic, crushed
• 12oz white mushrooms, sliced
• 2 tbsp olive oil*
• 2 cups fresh baby spinach
• 2 tbsp white all-purpose flour
• 1/2 cup heavy cream
• 1/4 tsp salt
• pinch of black pepper
• 1.5 cups vegetable broth
• 1 pound Rigatoni
• Sausage and Mushrooms
• Caramelized Onions
• 1/2 cup shaved parmesan cheese
• 2 tbsp crushed pistachios