Step 1

*Preparing lentil purée: Add 2 ½ times the amount of water as lentils. Bring to a boil, reduce heat, cover and simmer for 45 minutes. Stir frequently. Cool slightly and do not drain. In small batches, mash or purée lentils with a sieve, food mill, blender, food processor or potato masher. Purée should be the consistency of canned pumpkin. Add water to thin if needed.

Step 2

Preheat oven to 350°F.

Step 3

Stir together boiling water, oatmeal and butter. Let stand until margarine melts. Mix with remaining cake ingredients.

Step 4

Pour batter into a greased and floured 13 x 9-inch baking pan and bake for about 45 minutes or until cake springs back when lightly touched. Cool slightly in pan.

Step 5

Heat all topping ingredients in a saucepan; do not boil.

Step 6

Spread topping evenly over the cake. Place it under broiler, 4 to 6 inches from heat, and broil until topping is hot and slightly brown. Watch very carefully to avoid burning.