Chipotle Chicken Tacos with Potatoes and Guacamole

Preparation

1. Begin filling:

   Step 1

   Preheat broiler.

   Step 2

   Soak ancho chiles in boiling water (1 cup), 5 minutes.

   Step 3

   While chiles soak, broil tomatoes, onion slice, and garlic on a foil-lined rimmed baking sheet 3"-4" from heat, turning once, until lightly charred, 5-7 minutes.

   Step 4

   Drain chiles, discarding soaking liquid, and add to blender with tomatoes, onion, garlic, chipotles with sauce, cumin, 1/2 teaspoon salt, and cold water (2 tablespoons). Purée until smooth.

2. Heat tortillas:

   Step 5

   Preheat oven to 350°F. Wrap 2 stacks of tortillas in foil; warm in oven while finishing filling.

3. Boil potatoes:

   Step 6

   Cook potatoes in a 3- to 4-quart pot of well-salted boiling water until just tender but not falling apart, 5-7 minutes. Drain.

4. Finish filling:

   Step 7

   Coarsely grind chicken in a meat grinder or food processor (or use pre-ground meat).

   Step 8

   Heat oil in a 12" heavy skillet over medium-high heat until it shimmers. Add chile purée (it will splatter) and cook, stirring, 4 minutes (sauce will thicken).

   Step 9

   Add ground chicken and cook, stirring and breaking up clumps, 1 minute. Cover skillet and reduce heat; simmer, stirring occasionally, until chicken is cooked through, about 4 minutes.

   Step 10

   Gently stir in potatoes and reheat.

   Step 11

   Serve chicken and potatoes with warm tortillas and accompaniments.