How to Make It
Cook beans in boiling water 1 minute; submerge immediately in ice water. Drain well. Peel membranes; discard. Place peeled favas in a mini food processor with oil; pulse until mostly smooth.
Combine ricotta, zest, pepper, and salt in a small bowl. Spread 1 1/2 teaspoons ricotta mixture on top of each toast slice. Top each with 1 1/2 teaspoons fava puree.