Instructions

  1. Put the diced potatoes in a large saucepan and cover with water. Bring to a simmer, then cover and simmer over medium heat until tender, about 15 minutes.
  2. When the potatoes are done, drain them and transfer to a mixing bowl. Add the butter and milk and stir. Mash the potatoes well with a potato masher, then add a little salt if desired.
  3. In the meantime, make the "lava." Heat the milk in a small saucepan. Dissolve the flour in just enough water to make it smooth and flowing. When the milk is hot, stir the dissolved flour slowly into the saucepan. Sprinkle in the salt, then the optional cheese and stir until it is melted. Simmer the mixture gently until smooth and thick. Stir the ketchup into the sauce, but leave some red streaks showing, so that it looks "fiery."
  4. Divide the mashed potatoes among 4 serving plates. Have everyone shape them into mountains, then press the tops down lightly to flatten. Finally, have them make a small indentation at the very top with their thumb.
  5. Have the children arrange some of the peas or broccoli florets around the volcano. These are trees and bushes.
  6. Let each child pour some of the "lava" into the indentation at the top of each "volcano" with a small ladle. It should flow down the sides. It's fine if it drips over the "greenery" too. Eat at once, before the lava solidifies into magma!