Put the almonds, butter, garlic, chipotle, zest, and juice in a mini chopper and pulse to combine. Transfer to a large bowl and set aside.
Scatter the broccoli in a single layer on a sheet pan, toss in the oil and season with salt and pepper. Roast until florets begin to brown but are still crisp, about 15 minutes. Stir into the bowl with the butter mixture until butter melts to completely coat the broccoli. Place back on the sheet pan and bake until tender and beginning to brown on top, about 10 minutes more. Serve.
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