Mango, Prosciutto and Goat Cheese Appetizer Pizza

1 medium onion , chopped ( 1/2 cup)

1 firm ripe mango , seed removed, peeled and cut into 1/4-inch pieces (1 cup)

1/3 cup SMUCKER'S® Sweet Orange Marmalade

1 tablespoon Dijon mustard

2 tablespoons balsamic vinegar

1 to 2 teaspoons soy sauce

1 can (13.8 oz) Pillsbury® refrigerated classic pizza crust

4 oz thinly sliced prosciutto

1 cup shredded mozzarella cheese (4 oz)

1 cup crumbled goat (chevre) cheese (4 oz)