Turkey Tacos Picadillo

Name: Turkey Tacos Picadillo
Ingredients: 2 tablespoons corn oil; 1 medium onion, chopped (1 cup); 2 cloves garlic, chopped; 1/2 to 1 jalapeno pepper, stemmed, seeded and minced; 1 1/2 tablespoons chili powder; 1 teaspoon ground cumin; Kosher salt and freshly ground black pepper; 3/4 cup chopped canned tomatoes; 3/4 pound ground turkey; 1/3 cup chicken broth; 1/4 cup fresh cilantro leaves, roughly chopped; Oil, for frying; 12 (5-inch) corn tortillas, preferably white, or prepared taco shells; 1/4 head romaine or iceberg, thinly sliced; 3 ripe medium tomatoes, cored and diced; 1 to 2 Hass avocados, diced; 1 1/2 cups shredded Cheddar or Monterey Jack cheese; Sour cream, for garnish