Toss the jalapenos with 1 tablespoon olive oil, some salt and pepper and lay skin-side up on the prepared baking sheet. Bake until the skin is blistered, 10 to15 minutes. Place in a plastic baggie for about 5 minutes loosen the skin. Pull off the skin, remove the majority of seeds and ribs, and slice. Set aside.
Preheat the oven to 425 F degrees. Line a baking sheet with parchment paper.