low carb spaghetti squash parmesan boats

small spaghetti squash (approx 1.5 lbs each)

olive oil

salt and pepper,

whole milk ricotta cheese

egg, whisked

Italian seasoning blend

freshly grated Parmesan cheese, divided

Rao's Homestyle Italian Sausage & Mushroom Sauce, divided

fresh mozzarella, torn into bite-size pieces, divided

fresh basil leaves, torn, for garnish (optional)