1. Cut the squash in half and scoop out the pits. Spray a pan with oil spray and place the squash facedown. Bake at 350 degrees Fahrenheit, covered, for 45 minutes. Do not overbake or it will get too mushy.
2. Remove squash from the oven and allow to cool.
3. With a fork, scrape out the strands from the squash. Add pepper, pickles, and onion. Mix in the mayonnaise, pickle juice, salt, and pepper.
4. Serve cold or at room temperature.