1In 1-quart saucepan, mix sweet and sour sauce ingredients. Simmer over medium heat about 10 minutes, stirring occasionally, until sauce coats back of spoon.
2Heat oven to 400°F. Cut bread into 1-inch slices; place on ungreased cookie sheet. Brush both sides of each bread slice with olive oil; sprinkle 1 side of each with pepper. Toast in oven 5 to 7 minutes or until light brown.
3Spoon 1 teaspoon drained tomatoes onto each toasted bread slice; top with crumbled blue cheese and prosciutto strips. Drizzle with sweet and sour sauce.