pre heat oven too 350.

coat a 9 inch springfoam pan or a 13 x 9 baking dish with cooking spray

to prepare cake, beat butter until fluffy.

Add sugar and beat well.

Add eggs,one at a time,and vanilla; beat well.

Add flour,cinnamon & salt, beat until just combined.

Stir in banana and cooked oatmeal.

Spread batter in pan.

Bake about 35min.

Remove cake from oven.

Heat broiler.

Too prepare topping, melt butter in saucepan. Add milk & brown sugar, stir well. spread over warm cake. Place under broiler and broiler until browned & bubbly, about 4min.