Add all of the ingredients, except the olive oil, to a mini food processor or small attachment for your blender.
Pulse blender until all is well chopped. If you don’t have a food processor you can finely dice the red pepper, parsley, and shallot and mince the garlic and just stir the remaining ingredients in.
Pour the mixture into a small bowl using a rubber spatula to remove it all from the inside of the blender.
Drizzle in olive oil, adjust salt level and spice to taste and and stir well. Serve as a sauce with meat, vegetables or use as a sauce.
Notes
Refrigerator Storage: Store in a glass jar in the refrigerator for up to 3 weeks. Remove from refrigerator half hour before serving to allow it to come to room temperature since the olive oil may solidify. Drizzle a thin layer of olive oil over the top if needed before refrigerating to prolong the life of the sauce.Freezing: Chimichurri can be frozen in an ice cube tray and then once frozen, store frozen cubes in a tightly sealing freezer bag for up to 3 months. Remove as much of the air from the bag as possible to prevent freezer burn and make it last longer.Roasting red peppers: Roast seeded and halved red peppers cut side down at 450° F (232° C) for 15-20 minutes. Gently peel away skin and discard.To use as a marinade: Marinade meat in chimichurri for at least 2 hours, preferably overnight for chicken, steak, or pork. Seafood and vegetables should be marinated for under 1 hour before cooking as desired. When using as a marinade, I typically double the sauce and reserve half to serve alongside.