Chips in Salsa

plum tomatoes

tomatillos, husked and rinsed

medium white onion—half sliced crosswise 1/2 inch thick, the rest finely chopped for garnish

vegetable oil, plus more for frying

dried árbol chiles

garlic cloves, halved

Kosher salt

corn tortillas, each cut into 6 wedges, or one 1-pound bag sturdy, restaurant-style tortilla chips

Cotija cheese, shredded

chopped cilantro