Sopa Tarasca

Name: Sopa Tarasca
Ingredients: 1 pound dried pinto beans, soaked overnight; 2 tablespoons canola oil; 1 ½ cups diced onions; 4 cloves garlic, minced; 2 teaspoons ground cumin; 1 teaspoon chili powder; 6 cups water; 3 dried ancho chiles (see Tip), stemmed and seeded; 1 (28 ounce) can whole tomatoes; 1 teaspoon salt; ¼ teaspoon ground pepper; 1 ripe avocado, sliced; Crumbled queso fresco, lime wedges & tortilla chips for garnish