Weekend Pho with a Charred-Aromatic Broth

Read through the recipe, then gather the equipment and use the ingredient lines to prepare and measure everything. The broth needs several hours of gentle simmering and can be made a day ahead. Keep the brisket and sirloin refrigerated until each one goes in. Everything is prepared and measured before the pot goes on the heat.

Blanch 3 lb beef bones in a 10- to 12-quart soup pot: cover them with cold water by about 1 inch and bring to a rolling boil over high heat. Boil hard until thick gray foam rises and stops building, about 10 minutes. Drain the bones in the colander, rinse each one under running water to rub off anything clinging to it, and scrub the pot clean.

Heat the broiler on high with a rack about 4 inches below it. Set the onions and ginger cut side up on the foil-lined sheet pan and broil, turning once, until charred black over about half their surface and soft at the edges, about 15 to 20 minutes; push past golden, because the black is where the smoky sweetness comes from. Let them cool, then peel off the papery onion skins and any loose ash, keeping the charred flesh.

Put the rinsed bones, the charred onions and ginger, 1 lb beef brisket and 16 cups cold water in the clean pot. Bring to a simmer over medium-high heat, then turn to low heat so only lazy bubbles rise. Skim off the foam and fat with the ladle as they rise, until the surface stays mostly clear, about 20 minutes. Set the lid ajar.

Simmer over low heat until a fork slides into the brisket with light resistance and its thickest part reads at least 145°F (63°C) on an instant-read thermometer, about 1 hour 30 minutes. Lift out the brisket and let it rest for three minutes, then cool it in a bowl of cold water until the outside feels cool, and refrigerate it.

Toast 5 whole star anise, 1 whole cinnamon stick, 5 whole cloves, 1 tbsp coriander seeds, 1 tsp fennel seeds and the black cardamom pod, if using, in the small dry skillet over medium heat, shaking the pan, until fragrant and a shade darker, about 2 minutes. Tie them into the spice bag and drop it into the pot.

Simmer the broth over low heat with the lid ajar until it tastes rich and beefy, with a clear star anise and cinnamon aroma, about 3 hours. Keep the bubbles lazy; a hard boil makes the broth cloudy.

Meanwhile, make the chili-garlic vinegar: stir 1/2 cup unseasoned rice vinegar, 4 cloves garlic and 1/4 cup fresh red chiles together in the small jar and let it stand until the vinegar turns faintly pink and smells of garlic, about 30 minutes. Keep it on the table for serving.

Strain the broth: lift out the spice bag and bones, then pour the broth through the lined strainer into the second pot. Skim off most of the fat, leaving a few golden spots. The broth is clear, with a few spots of fat.

Stir 3 tbsp fish sauce, 1 tbsp crushed rock sugar and 2 tsp flaky kosher salt into the broth over low heat until the sugar dissolves. The sugar has dissolved.

Taste the broth. Aim for beefy and round, fragrant with star anise and cinnamon, with sweetness only in the background. If it tastes flat, add flaky kosher salt to taste, a little at a time. Keep the broth covered at a bare simmer over low heat. The broth tastes savory and well seasoned.

Soak 14 oz dried flat rice noodles (banh pho) in warm tap water until bendable and solid white, about 30 minutes. While they soak, freeze 8 oz beef sirloin until firm at the edges, then slice it paper-thin across the grain, and slice the chilled brisket thin across the grain.

Set out the table plate with about 2 cups bean sprouts, the Thai basil, 1 cup cilantro, the lime wedges and the sliced jalapeños. Bring the pot of noodle water to a boil over high heat and turn the broth up to a rolling boil. The noodle water and the broth are both at a rolling boil.

Cook the drained noodles in the boiling water over high heat a quarter at a time, stirring, until tender with a slight chew, about 10 to 30 seconds per batch. Lift each batch straight into a serving bowl with the spider. If they clump, rinse them briefly under hot water and shake them loose.

Cook the sirloin a quarter at a time: swish it in the spider in the broth at a rolling boil over high heat until brown with no red left and a few folded slices read 145°F (63°C) on an instant-read thermometer, about 20 to 40 seconds. Lay each portion on a bowl of noodles to rest for three minutes.

Dip the sliced brisket in the boiling broth in the spider and divide it among the bowls. Ladle boiling broth into each bowl to make 4 servings, and top them with the drained sliced onion and the green onions. Serve with the table plate and the chili-garlic vinegar, plus hoisin sauce and sriracha to taste, if you like. Refrigerate leftover broth promptly, or freeze it in portions, and bring it back to a boil, at least 165°F (74°C), before serving it again; refrigerate any leftover chili-garlic vinegar. The bowls are filled and topped.