Cut the spaghetti squash lengthwise and scoop out the seeds.
Brush the cut sides with approximately 1 tablespoon of melted butter and season with salt and pepper.
Place the squash cut side down on a baking sheet and roast for 35 to 45 minutes until tender.
While the squash is roasting, blend the cottage cheese, 1/2 cup of Parmesan cheese, remaining melted butter, garlic, salt, and pepper until smooth and creamy.
Once the squash has cooled slightly, flip it over and use a fork to shred the insides into spaghetti-like strands.
Divide the creamy sauce between the squash halves and mix well. If using, stir in the chopped parsley.
Top with shredded mozzarella and the remaining Parmesan cheese. Broil for 3 to 5 minutes until the cheese is melted and bubbling.
Serve immediately and enjoy!
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Notes
Store leftovers in an airtight container in the refrigerator for up to 3 days.