INGREDIENTS
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1 medium-large spaghetti squash
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1 tablespoon olive oil, plus more for greasing
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1 lb. bulk Italian sausage (I used hot chicken Italian sausage)
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1 small onion, diced
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3 cloves garlic, minced
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1/4 teaspoon red pepper flakes
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2 teaspoons Italian seasoning, divided
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good pinch of sea salt and a couple grinds of black pepper
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1 cup thawed and roughly chopped frozen spinach
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1 28 oz. jar tomato puree
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1 16 oz. container ricotta cheese
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1-1/2 cups shredded mozzarella cheese