Heat oven to 450°F. Put peppers cut side down on a sheet pan and roast for 25 to 30 minutes until softened and blistered. Cover in a bowl for 10 minutes, then peel and blend with passata and broth.
Heat 1 teaspoon oil in a saucepan and cook garlic, ancho powder and cumin for 30 seconds. Add pepper puree and 1/2 teaspoon salt; simmer for 8 minutes, stirring occasionally.
Heat remaining oil in a skillet. Soften onion for 5 minutes, add turkey and remaining salt and cook for 8 to 10 minutes, breaking the meat finely, until it reaches 165°F. Fold in corn and queso fresco off heat.
Reduce oven to 375°F. Warm tortillas under a damp paper towel in the microwave for 30 to 45 seconds until flexible. Spread 1 cup sauce in a 9-by-13-inch baking dish.
Divide filling among tortillas, roll and place seam side down in the dish. Spoon over remaining sauce, add Jack and bake for 20 to 25 minutes until bubbling and 165°F inside.
Divide into six shallow freezer containers, two enchiladas each with sauce. Refrigerate within 2 hours, chill fully, cover and freeze for up to 2 months.
Reheat one frozen portion in a microwave-safe container, loosely covered, at 50 percent power for 4 minutes. Separate gently if possible, then heat at full power in 1-minute intervals until both centers reach 165°F, usually another 3 to 5 minutes; rest for 2 minutes.