Place the garlic in your food processor and process until the garlic is broken into tiny pieces.
Add the cilantro, jalapeño (keep the seeds in case you want to make the sauce more spicy after tasting), salt, cardamom, cumin and red pepper flakes. Process until the mixture is all mixed together and very finely chopped.
While running the food processor, slowly drizzle in the olive oil. Scrape down the sides and blend until the sauce is mostly smooth.
Adjust to taste--for a spicier sauce, add the jalapeño seeds or additional red pepper flakes (1/4 teaspoon at a time) and blend again. Too bitter? You can add more salt or give the flavors some time to mellow. This sauce's flavor transforms with time, so if it's too spicy or you just don't love it right off the bat, let it chill in the fridge and try it again in an hour.