Using an electric mixer, whip the ricotta until light and airy, about 2 minutes. Transfer to a serving plate and use a spoon to create a well in the center. Fill with the olive oil and sprinkle with the rosemary. Generously sprinkle with salt and pepper.
Prepare a grill for medium-high heat. Drizzle the bread with olive oil and sprinkle with salt. Grill on the oiled side until toasted, about 2 minutes. Serve with the ricotta.