Make It
Step 1
Preheat oven to 350° F. Move oven rack to lowest position. Butter 9-inch-square baking dish.
Step 2
Combine water and bouillon in a large saucepan. Bring to a boil over medium-high heat. Add cauliflower florets; cook for about 2 minutes or until just tender. Drain, reserving 1 cup cooking liquid. Transfer cauliflower to large bowl to cool. Place spinach in same pan with ½ cup reserved liquid and cook until just wilted. Drain and cool. Squeeze spinach dry; finely chop.
Step 3
Melt ¼ cup butter in same pan over medium heat. Add flour; whisk for about 2 minutes or until smooth. Gradually whisk in evaporated milk and remaining reserved ½ cup cooking liquid. Whisk constantly over medium heat for about 3 minutes or until sauce thickens and boils. Remove from heat. Stir in spinach. Using fingers, coarsely crumble cauliflower into spinach mixture. Stir gently to blend. Spread vegetable mixture into prepared dish.
Step 4
Bake for about 40 minutes or until heated through. Serve hot.