Heat olive oil in a large soup pan or Dutch oven over medium-high heat, add onion and cook until softened, about 5 minutes. Add the cauliflower and vegetable stock, bring to a boil, reduce heat, cover, and simmer for 20–25 minutes or until the cauliflower is very soft.
Blend the soup in batches, return to the pot, add the House Party Cheesy Dip, and heat until the House Party is melted and incorporated. Taste and adjust seasoning.