Combine the scallops, tomatoes, herbs, peppers, olive oil, and hot sauce. Add enough lime juice to cover the scallops. Season with salt and pepper, to taste. Marinate, covered, in the refrigerator at least 1 hour and up to 8 hours, stirring occasionally.
Trim the cucumber slices with a round, fluted cutter to remove the rind. Scoop a pocket out of the middle of the cucumber slices. Do not cut all the way through the slice. Fill the cucumber cups with the seviche. Garnish each seviche cup with a small dot of sour cream and a cilantro leaf.