Preheat oven to 400 F, and line a baking sheet with parchment. Slice the spaghetti squash in half and place it cut side down on your baking sheet. Bake in preheated oven for 30-40 minutes, or until the squash is fork tender.
Allow squash to cool completely, then scoop the seeds with a spoon and discard. Then shred the squash into noodles with a fork.
Meanwhile, sprinkle chicken breasts with salt and pepper. Heat a large skillet to medium-low, and add a tablespoon of olive oil, along with the chicken. Sear on each side until the chicken is almost cooked through.
Add the spinach, and saute until wilted and the chicken has fully cooked through (will reach an internal temp of 165 F).
Add the butter to the skillet. Once melted, saute the garlic until fragrant, about 1 minute. Add the cream, almond milk, parmesan cheese, red pepper flakes, black pepper, and 1 1/2 teaspoon salt. Stir the ingredients together as they melt, and remove from heat.
Stir in the cooked spaghetti squash. Sprinkle with parsley before serving, and enjoy!