It's a traditional food pairing in America. Back in the 1960's, I think, the administration that governs the US education system realized that tomato soup and a cheese sandwich, meets all of the nutrition requirements for a growing child. So, it became practice to serve the two dishes as a single meal.
Max requested grilled cheese sandwiches for dinner. That means I have to find the last jar of homemade tomato soup in the pantry, which may or may not have been consumed already. 🥪 🍲