I have an interesting discovery to share today: Healthy broccoli cheddar soup still tastes as rich and comforting as the classic version. For this recipe, I took out all the flour, butter, and cream and thickened the soup with a cauliflower and onion purée. I loved it (no surprise), but (to my amazement) it was also 100 percent family approved. This broccoli cheddar soup is a lighter,…