Place broccoli florets, chopped potatoes, chopped onions and water in a saucepan. Heat over medium-high. Cover the saucepan and bring to a boil. Reduce heat to medium-low and simmer until vegetables are tender.
Blend vegetable in a blender. Return to saucepan, add butter, dried oregano leaves, basil and lemon juice. Season with salt and pepper. Cover and cook for 3-5 minutes. If you like creamy soup, add whipping cream instead of butter and, serve with lemon juice on the side.