Lightly coat a skillet with cooking spray. Cook and stir onion over medium heat until transparent (about 5 minutes).
Add spinach. Cook until thoroughly heated (about 1-2 minutes).
Reduce heat; add cream cheese. Stir until melted and smooth. Stir in sour cream, Parmesan cheese, and artichokes. Remove from heat. Season with black pepper and salt. Transfer to a 1 1/2-quart microwave-safe bowl (or baking dish) and bake and/or microwave until warmed through right before serving.
Serve with baked tortilla chips Or home-made pita chips (Take any high fiber pita bread like ‘La Tortilla Factory’s Smart & Delicious Low-Carb High Fiber Large Tortillas’. Spray pita with non-stick cooking spray and flavor with a pinch of salt, pepper, garlic powder, and 1 Tbs grated Parmesan cheese. Bake it at 350 degrees for about 8-10 minutes.)