Fill a glass oven pan with cut up apples.
Topping:
mix one stick of room temperature butter (1/4 pound) with rounded 1/2 cup brown sugar
mix 1 teaspoon of cinnamon and 2 or 3 grinds of sea salt into 1/2 + 1/8 cup flour and add into butter mixture
add in 1/2 cup rolled oats
scatter topping evenly over the apples
Bake in pre-heated 375 degree oven for 30 minutes. Test the apples with a fork to make sure they are soft and cook for a bit more if they are still firm.