Preheat the oven to 375 degrees F (190 degrees C). Line a baking pan with aluminum foil.
Cut squash in half lengthwise. Remove and discard seeds. Drizzle 1/2 teaspoon olive oil over each half and spread with a pastry brush. Sprinkle lightly with salt and pepper. Place cut-side down on the prepared baking pan.
Bake in the preheated oven until tender and a steak knife can easily be inserted into flesh, about 30 minutes.
Meanwhile, heat 1 tablespoon olive oil in a skillet over medium heat. Sauté onion, bell pepper, and garlic in hot oil until tender, 5 to 7 minutes. Remove from heat.
Remove cooked squash from the oven and reduce oven temperature to 350 degrees F (175 degrees C). Spray a 2-quart casserole dish with nonstick cooking spray.
Remove strands from squash using a fork or spoon and place them into a large bowl; discard skins. Add sautéed vegetables, black beans, 1/2 cup Mexican cheese, cilantro, cumin, salt, and pepper; mix well. Spoon mixture into the prepared casserole dish. Sprinkle with remaining 1/4 cup Mexican cheese.
Bake in the preheated oven until bubbly, 15 to 20 minutes. Remove from the oven and top with tomatoes, avocado, and olives.
Nutritional Facts
Per 8 servings
Calories: 204
Carbohydrate: 20g
Fat: 12g
Fiber: 6g
Protein: 7g
Sugar: 1g
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