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1
Position an oven rack 4 to 5 inches from the heating element, and preheat the broiler.
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2
Line a baking sheet with foil.
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3
Cut the stem end off the jalapenos, cut each in half lengthwise and remove and discard the seeds (wear food-grade gloves if your skin is sensitive).
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4
Arrange the jalapenos skin-side up on the prepared baking sheet, and brush with the oil.
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5
Broil until the peppers are blackened and puffy, 3 to 4 minutes.
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6
When cool enough to handle, rub off the skins (running under cold water helps).
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7
Cut 2 of the halves into large dice so you have 32 pieces (1 for the top of each biscuit); set aside.
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8
Finely chop the rest of the peppers, and transfer to a medium bowl.
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9
Switch the oven from broil to bake, and preheat to 400 degrees F. Remove the foil from the baking sheet, and line it with parchment.
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10
Beat the egg well in a small bowl.
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11
Add the cream cheese, mozzarella and half the egg to the bowl with the chopped peppers, add 1/4 teaspoon salt and mix to combine.
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12
Separate the biscuit rounds, and cut each into quarters.
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13
Make a deep indentation in the center of each quarter, and fill with a heaping teaspoon of the pepper-cheese mixture (it will mound above the biscuit a fair amount).
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14
Brush any exposed biscuit with the remaining beaten egg.
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15
Bake until the biscuits are puffed and golden around the top, 10 to 12 minutes.
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16
Garnish each with a piece of reserved jalapeno.