In large skillet mix together sausage, spinach, roasted tomatoes, oregano and minced garlic.
Heat through over medium high heat for 5-6 minutes.
Remove from heat and mix in mozzarella.
Use a small spoon to stuff each manicotti with 2 tablespoons mixture layering into the bottom of a pre-spayed disposable foil pan.
Cover manicotti with pasta sauce.
Sprinkle top with remaining mozzarella cheese
Cover top of foil lined pan with plastic wrap. Seal with lid or layer of aluminum foil.
Label and freeze.