Have cream cheese at room temperature in a large bowl for ease in mixing.
In a cast iron skillet sauté the onions and peppers in butter until translucent. Add to the bowl. Stir in remaining ingredients and blend well. Taste to see if it needs any salt and pepper.
Add the mixture into the same skillet you sautéed the vegetables in if it is large enough and bake in the oven for 20 minutes or until hot and bubbly. Top with sliced green onions.