Preheat the oven to 400 degrees F (200 degrees C). Line a baking sheet with aluminum foil.
Cut and remove stem from spaghetti squash using a sharp knife. Cut squash in half lengthwise and scrape out the seeds. Brush the inside with olive oil and sprinkle with salt and pepper. Place on the lined baking sheet.
Bake in the preheated oven until soft, about 45 minutes. Scrape cooked flesh out into a bowl and set aside. Return spaghetti squash shells to the baking sheet. Leave the oven on.
Cook bacon in a large skillet over medium-high heat, turning occasionally, until evenly browned, 5 to 6 minutes. Drain on paper towels.
Add mushrooms and garlic to the skillet and cook for 4 to 5 minutes. Add spinach and cooked bacon; stir until spinach is wilted, 2 to 3 minutes. Remove mixture from the skillet and add to squash flesh. Mix in sour cream, salt, and pepper; stir until filling is evenly combined.
Spoon filling back into squash shells. Sprinkle each squash half with 1 tablespoon blue cheese. Return to the oven and bake until cheese is melted and squash is heated through, 4 to 5 minutes.
Nutritional Facts
Per 2 servings
Calories: 339
Carbohydrate: 21g
Fat: 24g
Fiber: 1g
Protein: 14g
Sugar: 1g
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