From an old family cookbook:
2 cups Flour
2 tablespoons vegetable oil
2 cups water
1 cup salt
4 teaspoons Cream of Tartar
Food colouring
Mix dry ingredients in a saucepan. Add water and colouring, and lastly oil. Heat gently, and turn slowly until it is cooked. (It may go lumpy at first but it evens out later and leaves the sides of the saucepan when ready.) Turn out onto a floured board and work lightly with floured hands until it isn't 'sticky' anymore.
Store in an airtight container in the fridge. Stays workable for weeks.