Puncture spaghetti squash a few times with a sharp knife. Place on sheet pan and bake for about 1 hour -- it should be tender when pierced with a knife When finished baking, remove from oven and allow to cool slightly.
Cut in half and carefully scrape out seeds. With a fork, scrape the squash to separate flesh into "strands" and place in a medium bowl. Set aside.
In a medium skillet, heat 2 tablespoons of olive oil on medium heat. Add garlic to pan and cook for about a minute, careful not to burn. Add spinach and sauté until just wilted. Remove from heat and set aside.
In the bowl of a food processor, add ½ cup cottage cheese and egg. Process until almost smooth. (Ricotta cheese consistency.) Set aside.
In a large bowl, combine squash strands, sautéed greens, cottage cheese mixture, ½ cup marinara sauce, ¼ cup grated parmesan, chopped olives, oregano, and basil until well incorporated.
Spray a glass baking dish with lightly non-stick cooking spray. Spread squash mixture evenly in baking dish.
Spread remaining marinara sauce evenly over squash mixture. Sprinkle with remaining parmesan.
Cover with foil and bake for 20 minutes. Remove foil, and continue baking for 15 more minutes or until bubbly and slightly browned.