Melt butter in a 3-quart saucepan. Stir in flour and cook until bubbly.
Add brewed tea, milk, cauliflower, one diced potato, and sea salt. Cook on medium heat until potato is soft (5-7 minutes). Remove from heat and puree with an immersion blender.
Add the remaining diced potatoes, cover and cook on low heat for approximately 20 minutes, or until potatoes are soft.
To serve, top with sour cream, diced green onions, shredded cheddar cheese, and crumbled cooked bacon.