PEEL and slice bananas in half crosswise, then lengthwise. Arrange bananas, cut-side up, in one layer, on baking sheet. Freeze until firm, about 2 hours.
BREAK frozen bananas into chunks and place in food processor. Whirl until creamy. Add almond butter and vanilla. Whirl until mixture is smooth. Scoop into 3 serving dishes. Drizzle with chocolate sauce and sprinkle with toasted almonds. Serve immediately.