Prepare the peppers – If using fresh chilies, roast them (and the red peppers if not jarred) until softened and lightly charred. Peel skins if desired for smoother texture.
Blend base – In a food processor, add white beans, roasted peppers, chilies, garlic, vinegar/lemon juice, and olive oil. Blend until mostly smooth.
Add feta – Crumble in the feta and pulse until incorporated but still a little textured (traditional tirokafteri isn’t fully pureed).
Adjust texture – If too thick, add a spoonful of Greek yogurt or another drizzle of olive oil until creamy but spreadable.
Season – Taste and adjust with salt (careful, feta is salty), pepper, and extra chili for heat.
Serve – Transfer to a bowl, drizzle with olive oil, and sprinkle with paprika or chili flakes. Serve with pita bread, crusty bread, or raw veggies.