Place frozen spinach in large microwave-safe bowl and heat for about 1 minute to soften.
Add the remaining ingredients and combine
Heat in microwave on high for 10 minutes. Halfway through cooking time stir the mixture two or three times then continue cooking for the remaining time.
Serve with your favorite chips.
** I've used sharp cheddar and mild cheddar and no one can tell the difference. You can adjust the amount of cheddar you use too. If you prefer a cheesier dish, go for the 12 oz bag of cheese!