Super Fast Upside-Down Shepherd's Pie

INGREDIENTS

1 tbsp

olive oil

12 oz

lean ground beef

small yellow onion, chopped (about 1 cup)

small turnip root, peeled and chopped (about 1 cup)

medium carrot, peeled and chopped (about 1 cup)

3 cloves

garlic, minced

2 tsp

chopped fresh rosemary

1 1/4 tsp

kosher salt, divided

1 tsp

black pepper

2 cups

unsalted beef stock

2 tbsp

all-purpose flour

1 cup

frozen green peas, thawed

3 cups

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

1/2 cup

whole milk

1/3 cup

sour cream

2 tbsp

unsalted butter

Chopped fresh flat-leaf parsley