Blanch fava beans for 1 minute. Place beans in a heat proof bowl and prepare another bowl with ice water. Cover beans in boiling water and allow to sit for 1 minute. Drain and immediate plunge into ice water. Allow to sit until room temperature.
Peel beans by pinching the smooth end (or slice slightlto create a hole in the skin. Pinch the opposite end and push the halves of the bean out.
Combine all spices with vinegar and olive oil and add peeled beans. Cover and allow to sit in the fridge for at least 4 hours. Agitate occasionally to keep the vinegar and oil distributed evenly.
Serve with crusty bread or other starch to soak up the sauce.