2 Hass avocados—halved, pitted and peeled
1/4 cup low-fat sour cream or Greek yogurt
1 small jalapeño, seeded and thinly sliced
2 tablespoons minced red onion
2 tablespoons chopped cilantro
5 tablespoons fresh lime juice
Kosher salt and freshly ground pepper
1 small head of napa cabbage, shredded (4 cups)
2 tablespoons vegetable oil, plus more for brushing
2 pounds thick red snapper fillets with skin, cut crosswise into ten 2-inch-wide strips
Ten 7-inch flour tortillas, warmed
2 medium tomatoes, thinly sliced
Hot sauce, for serving
Lime wedges, for serving