Preheat your oven to 350°F (175°C).
Prepare chicken: Shred 3 to 5 cups of cooked rotisserie chicken.
Chop vegetables: Dice 1 red bell pepper and 1 medium onion.
Sauté vegetables: Cook the bell pepper and onion in a pan until soft and translucent.
Make creamy base: In a large mixing bowl, combine cream cheese, sour cream, mayonnaise, and cream of chicken soup. Whisk or stir until smooth.
Mix filling: Add shredded chicken and sautéed vegetables into the creamy base. Season with garlic powder, onion powder, salt, and pepper.
Assemble: Transfer the mixture to a greased 9x9 or 9x13 inch baking dish.
Add topping: In a separate bowl, combine crushed crackers with melted butter. Sprinkle evenly on top.
Optional: Add grated cheese and crispy bacon bits on top.
Bake: Place in the oven and bake for 25–30 minutes, until hot, bubbly, and golden on top.
Cool slightly and serve warm.