Mashed Pea and Ricotta Toast

Name: Mashed Pea and Ricotta Toast
Ingredients: 1 1/2 cups fresh peas (1 1/2 to 2 pounds in their shells) or 1 1/2 cups frozen peas; Kosher salt and freshly ground black pepper; 1/2 cup snow peas, finely julienned; 1/2 cup extra-virgin olive oil; 1 lemon, zested and juiced; 1/2 bunch fresh mint, small leaves reserved for garnish and large leaves julienned; 1/4 red onion, finely julienned; 4 slices country sourdough, cut 3/4-inch-thick; 3/4 cup sheep's milk ricotta; 1 small chunk Parmigiano-Reggiano, freshly grated