Preheat the oven to 350 degrees F.
Lay the bread slices in a single layer on a large baking sheet lined with parchment paper. Brush lightly with 2 tablespoons of the olive oil. Toast in the oven until lightly golden, 15 to 20 minutes, rotating halfway through. Let cool enough to handle, then rub the bread with the cut sides of the garlic clove
Bring a medium pot of heavily salted water to a boil. Add the fava beans
and boil for 2 minutes, then remove with a skimmer
and plunge into an ice bath to cool and stop the cooking (keep the water boiling to blanch the pea s). Remove the fava beans from the ice bath and peel
the outer skin off the beans using your fingers and discard. Blanch
the peas in the boiling water for 1 minute, then plunge into the ice bath. Drain
and pat dry to avoid a watery puree.
Combine the favas and peas in a bowl with the remaining olive oil and mash
with a potato
masher or pastry
cutter. Stir in the goat cheese, mint
and lemon juice
. Thin with additional olive oil
as needed and season with salt and pepper. Cover and refrigerate until ready to serve.
To serve, top each crostini
with a spoonful of the pea and fava bean puree and top with grated lemon zest
. Serve immediately.