A deeply flavored tortilla soup with pasilla chiles, avocado, and cheese in a smoky tomato broth. This healthy, vegetarian-adaptable soup is a fresh, family dinner classic.
Preheat oven to 350°F. Cut corn tortillas into strips and bake for 10–12 minutes until crisp, stirring halfway for even browning.
Toast the pasilla chiles in a dry skillet over medium-low heat for 1–2 minutes per side, being careful not to scorch. Remove stems and seeds, then soak in hot water for 15 minutes.
In a large pot, heat olive oil over medium. Add chopped onion and garlic, sauté for 4–5 minutes until translucent and fragrant.
Blend soaked pasilla chiles, tomatoes, sautéed onion and garlic to a smooth puree. Pour into the pot and cook over medium-high heat for 6–8 minutes to deepen flavors, stirring frequently.
Add vegetable broth, oregano, salt, pepper, and simmer over medium-low for 20 minutes. Taste for seasoning adjustment.
Ladle soup into bowls, garnish with tortilla strips, sliced avocado, and crumbled queso fresco. Serve immediately for freshest texture.