Spinach Dip

2 boxes frozen chopped spinach
1 stick butter
1 onion, chopped
1 can Rotel (diced tomatoes and green chilies)
8 oz. grated cheese
8 oz. cream cheese

Boil spinach, drain. Saute onion in butter, add Rotel and cheese and stir until melted. Add spinach.
Season with salt and pepper or Tony Chachere's seasoning. It too thick, add milk. Serve with crackers or rolls.