Place the peas, mint, garlic, salt, pepper and 6 tablespoons olive oil in a food processor or a very good blender. Process until well blended and fairly smooth (there will still be some chunky peas here and there). If the mixture is too thick, add another tablespoon of olive oil. Taste and season with more salt and pepper, if desired.
Transfer to a covered container and chill until ready to serve (it will keep in the refrigerator for up to 4 days).
When ready to serve, top each slice of bread with a generous spread of the pea dip. Drape pieces of prosciutto on top of each slice and serve.
Notes
If you are preparing this recipe as GLUTEN-FREE, just be sure to serve it on something that is GF- like rice crackers.