The secret to kofta that hold together is to knead the mince for a couple of minutes, like bread dough, until it turns sticky. Squeeze the grated onion and cucumber dry as well, or the kofta slide off the skewers and the tzatziki turns watery.

A serving has about 32g of protein, from the lamb and from the tzatziki, which is made with strained Greek yogurt rather than a thin sauce. Lamb also brings the kind of iron the body absorbs best, plus zinc and vitamin B12, all of which men and women over 40 are sometimes short of.
The portion is deliberate. The NHS advises that anyone eating more than 90g of red and processed meat a day, cooked weight, should cut down to 70g. Here 400g of raw lamb shared between four comes to roughly 70g cooked each, so a proper plate of meat still sits within that advice. If you eat red meat most days, it is worth keeping an eye on the total.
Bulgur wheat is the part people skip. It is a whole grain that only needs soaking, not cooking, so it is quicker than rice, and it keeps its fibre. With the tomatoes, cucumber and herbs, a serving has about 7g of fibre, which slows how quickly the carbohydrate reaches the blood. That is why this is tagged for blood sugar as well as testosterone.
Greek yogurt does double duty: extra protein and a cool contrast to the spices. Garlic appears three times, because it belongs in every part of this dish.
For a beef dinner with a similar balance, see the beef and black bean chilli. For how protein, fat and body weight affect testosterone, see the best diet for testosterone.