Caramelized Onion-and-Gorgonzola Mashed Potatoes

INGREDIENTS

3 lb

Yukon gold potatoes, peeled and quartered

1 3/4 tsp

salt, divided

2 tbsp

butter or margarine

1 tbsp

olive oil

medium onions, diced

garlic cloves, minced

2 tsp

chopped fresh or 1/2 teaspoon dried rosemary

1/2 cup

butter or margarine

3/4 cup

half-and-half

3/4 cup

crumbled Gorgonzola or blue cheese

3/4 tsp

pepper

Garnish: fresh rosemary sprigs