• Wash and dry produce. Quarter lemon. Toast sourdough. Separate prosciutto slices and lay flat on a work surface; cut in half crosswise. Halve, core, and thinly slice apple.

• In a medium bowl, whisk together ricotta, a drizzle of olive oil (large drizzle for 4 servings), a pinch of salt, and pepper until whipped.

• In a large bowl, combine arugula, a drizzle of olive oil (large drizzle for 4 servings), juice from one lemon wedge (juice from two wedges for 4), a pinch of salt, and pepper.

• Spread a thin layer of ricotta over toasted sourdough slices. Top with arugula, prosciutto, and as many apple slices as you like. Drizzle with dressing.

• Divide toasts between plates; add a squeeze of lemon juice to taste over top. Arrange any remaining apple slices on the side and serve with remaining lemon wedges.