In a bowl, combine condensed cheese soup and the shredded cheese. Spread mixture on baguette slices. Butter the outside of the sandwiches.
Heat large frying pan or griddle over medium-high heat. Place sandwiches in the pan and cook until golden brown, approximately 2 minutes. Flip sandwiches and cook second side. Cover frying pan to ensure that the cheese melts. Serve as "dunkers" with mugs of Spicy Tomato-Cheese Soup.
Spicy Tomato-Cheese Soup:
Combine all ingredients in a medium saucepan. Heat thoroughly, over medium heat, stirring occasionally.