Potato peanut curry

2 lb potatoes, peeled and cubed
1 can tomatoes
2 C water
1/2 t salt

4 T oil
4 T tahini
4 T peanut butter
2 t cayenne
8 cloves garlic
1 t turmeric

Bring the first four ingredients to a gentle boil together.
Mix the last six ingredients in a bowl and heat in a microwave for a few minutes until it is fragrant.
Mix everything together and cook until the potatoes are tender.