Let’s dive into the steps to create this comforting soup:

1. In a large pot, melt the butter over medium heat. Add the diced onion and garlic, sautéing until the onion is translucent, about 3-4 minutes. This step always reminds me of my grandmother’s kitchen, where the smell of sautéed onions was a daily delight.
2. Add the ground beef to the pot, breaking it up with a spoon as it cooks. Cook until the beef is browned and cooked through, about 5-7 minutes.
3. Stir in the chopped celery and cauliflower, cooking for another 3 minutes until they start to soften.
4. Pour in the beef broth and bring the mixture to a simmer. Let it cook for about 10 minutes, allowing the flavors to meld together beautifully.
5. Reduce the heat to low and slowly stir in the heavy cream and Dijon mustard, mixing until well combined.
6. Gradually add the shredded cheddar cheese, stirring continuously until the cheese is completely melted and the soup is creamy. This step always brings me joy as it reminds me of the cheesy dishes my family loves.
7. Season the soup with salt and pepper to taste. Serve hot, garnished with chopped pickles and cooked bacon if desired.