1 cup fine-grain bulgur
1 pound lamb shoulder, ground fine
1/4 cup grated onion
1 teaspoon cumin seeds, toasted and ground, or 1 teaspoon ground cumin
Pinch cayenne pepper
Salt and pepper
3 tablespoons olive oil, plus more for oiling the pan
2 cups sliced onions, 1/4-inch thick
1/2 cup pine nuts, lightly toasted
Greek-style yogurt, for serving.