Method

• Boil water and cook pasta for 10 minutes
• In a separate pan, sauté sausage in a little olive oil
• Add onion to pan and cook for a few minutes
• Add garlic to pan and cook for a minute, until fragrant
• Drain pasta, reserving 1 cup pasta cooking water. Put tinned tomatoes in pasta pot and cook over medium-high heat until most of the water evaporates.
• Remove tomatoes from heat and stir in ricotta. Add sausage/onion/garlic mixture
• Squeeze water from thawed frozen spinach and mix spinach into sauce.
• Stir in 3/4 cup mozzarella cheese. Add pasta cooking water as needed to make a thick sauce.
• Add noodles and gently stir to combine.
• Sprinkle with remaining mozzarella and broil until cheese is browned and bubbling.