Place the eggs, mint and salt in a medium bowl and whisk until well combined. Slowly add the milk mixture while whisking to blend. Pour the mixture into 6 small ramekins (about 4 ounces each).
Place the ramekins in a baking pan and pour in the boiling water to surround the ramekins withing 1/2 inch of the ramekin tops. Bake until the custard is almost completely solid - 45 minutes to one hour. Cool slightly, and garnish with fresh peas and pecorino shavings. Can be served warm, cold, or at room temperature.