Lightly spray a large, nonstick skillet with no fat/no calorie cooking spray. Lightly sauté celery and onion about 1 -2 minutes, add chicken breasts and cook until almost cooked through on each side. Season with a very small amount of sea salt, pepper, garlic powder, and lemon pepper seasoning. Squeeze lemons juice on top of chicken as it’s cooking. Add almonds. Once chicken is almost finished add spinach (3-4 large handfuls or 1⁄2 bag- they shrink significantly). Pour broth over spinach. Cover and cook till chicken is done and spinach is cooked.