Farmer Bob and I love spicy food, so we like the extra heat from the jalapeno pepper. The Greek yogurt and herbs balance out the heat. If you don't like it quite so spicy, then make it without the jalapeno pepper and it will be just mildly spicy. You can also reduce the amount of ground cayenne pepper. Be careful to wait till the end to add salt because the sauce reduces and, depending on how much salt is in your stock, you might end up with sauce that is too salty.