I don't think this is a heart-healthy snack.
Hot Buttered Cheerios
recipe from a 1982 Cheerios advertisement
Melt 1/4 cup butter or margarine in a 10-inch skillet over low heat. Add 4 cups of Cheerios. Cook and stir cereal 2 to 3 minutes until well-coated and hot. Sprinkle with salt and serve.