Black skillet apple crisp

Apple crisp
Put in 4 or 5 peeled, sliced, firm apples
Zest and juice of 1 large lemon
1 t. cinnamon
1/2 t. nutmeg and/ or cloves
add 1/2 C. walnuts to apples

Top with oatmeal mixture. Chop up more butter on top. Cook in 350 over for 45 min.

Topping
3/4 C. Flour
1/ t. salt
1 C. brown sugar
3/4 C. oats
1 stick butter cut into cubes

Blend these ingredients with knives or in food processor.
Then add 3/4 C. walnuts