Upside-Down Shepherd's Pie

INGREDIENTS

1 tbsp

olive oil

10 oz

90% lean ground beef

1 cup

chopped onion

1/2 cup

chopped turnip (about 3 oz.)

1/2 cup

chopped carrot (about 1 medium carrot)

2 tsp

chopped fresh rosemary

garlic cloves, minced

2 cups

unsalted beef stock

2 tbsp

all-purpose flour

1 cup

frozen green peas

1/2 tsp

black pepper

3/8 tsp

kosher salt

3 cups

frozen mashed potatoes (such as Ore-Ida Steam n' Mash)

1/3 cup

2% reduced-fat milk