Whip up the meatball recipe according to Sara's directions. While meatballs bake, combine Frank's red hot and butter in a sauce pan. Heat until butter is melted. Taste and add more butter as desired to reach a comfortable spicy/heat level.
When meatballs are done, toss with the sauce. Layer spinach, then meatballs, and sprinkle (or drizzle) blue cheese or ranch. Serve while still warm.
Notes
*This sandwich works equally as well with bbq sauce!