1 teaspoon ground cumin
1 teaspoon chili powder
1 teaspoon brown sugar
1/4 teaspoon finely ground coffee
Salt and freshly ground pepper
Two 8-ounce skinless, center-cut salmon fillets
Extra-virgin olive oil, for brushing
2 tomatillos, husked and quartered
2 tablespoons chopped cilantro
1 small jalapeño, seeded and quartered
1 garlic clove
6 tablespoons sour cream
1 ripe Hass avocado—halved, peeled and pitted
4 cups finely shredded red and green cabbages (12 ounces)
8 corn tortillas