3 heads broccoli cut lengthwise into large spears stalks peeled 1 1/2-pounds
Steps:
Preheat the oven to 450
In a heatproof medium bowl cover anchos with boiling water and let sit until softened about 20 minutes Drain the chiles and pat dry with towel Discard stems and seeds then coarsely chop
While the anchos are softening heat 2 tablespoons of the olive oil in a small skillet until shimmering Add pine nuts and cook over moderately high heat shaking pan for about 3 minutes or until lightly browned Add garlic cumin and coriander and cook stirring until the garlic is softened and the pine nuts are deep golden about 1 minute longer Set aside until cool
In a blender or food processor puree the pine nut mixture with the anchos and butter Season the ancho butter with salt and transfer to a bowl
In a large mixing bowl toss broccoli with the remaining olive oil and spread onto 2 large rimmed baking sheets Roast the broccoli in the upper and lower thirds of the oven for 15 minutes or until crisp-tender After 7 minutes swap shelves and rotate pans Transfer broccoli to a bowl and toss with the ancho butter Season with salt and return to baking sheets and roast for 10 minutes longer or until the broccoli is tender Arrange broccoli on a platter and serve warm or at room temperature