End blossom rot is caused because of not enough calcium in the soil, and infrequent watering.
Mum can grow them with her eyes shut, so I've been getting them off her.
This is what I made with them, besides eating them with other veggies and making ratatouille, like I did when we went camping recently.
1-2 grated medium zucchini(about 2 and a half cups)
1 onion finely chopped
1 cup chopped bacon
1 cup grated cheese
1 cup SR Flour
1/2 cup oil
salt and pepper
Place all ingredients in a big bowl. Mix together well.
Grease a pie dish or cake tin.(I line the bottom of a spring form cake tin and spray with some olive oil spray).
Bake at 200 degrees for 30-40 minutes.