In a blender, add olive oil, feta cheese, and Greek yogurt. If including the roasted red peppers, add them here as well.
Blend until smooth, adding more olive oil as needed to reach the desired consistency.
Add in chili flakes and chipotle powder and blend until evenly distributed.
Check flavors and if more spice is desired, add more chili flakes and/or chipotle powder, as needed. If mixture is too salty for your taste, add more yogurt as needed and blend.
Serve immediately or refrigerate. Consistency may harden slightly the longer it sits. Garnish with chives or parsley, and serve with pita chips, bread, or vegetables