Place 8-10 jalapenos on a cookie sheet, drizzle with 1-2 tablespoons olive or canola oil and sprinkle with salt and pepper. Roast peppers for 20 minutes or until skin is blistered and starting to darken.
Remove peppers from the pan, place in a bowl, and cover tightly with plastic wrap. Let peppers sit for 15-20 minutes, then remove from the bowl. Peel the peppers (to the extent you can) and remove the seeds. It's fine if some peel and seeds remain.
Place 1/4 cup pine nuts on a baking sheet and roast in the oven for 8-10 minutes until just turning lightly brown.
Combine jalapenos, 1 1/2 cups tightly packed cilantro leaves, pine nuts and 3 cloves garlic in a food processor and process until coarsely chopped. Drizzle in 1/2 cup olive oil while motor is running and process until smooth.
Add 3/4 cup grated Parmigiano Reggiano, a little salt and pepper, and pulse a few times until blended. If the mixture is too thick, add additional olive oil one teaspoon at a time and pulse.