caramelized onion focaccia with blue cheese and radicchio

INGREDIENTS

2 1/2 cups

all-purpose flour

1 tsp

salt

1 tsp

instant yeast

1 tbsp

olive oil

2 tbsp

olive oil

large red onion, thinly sliced

1 tsp

sugar

1/2 tsp

salt

1 tsp

balsamic vinegar

1/2 cup

crumbled Gorgonzola or feta cheese

1/2 cup

each shredded radicchio and escarole

1/4 cup

toasted walnuts, chopped