Ingredients:
4 large potatoes (unpeeled), cubed (2 lb/1 kg)
1/4 cup (50 mL) milk or buttermilk
1 green onion, sliced
1 lb (500 g) lean ground beef
1 tbsp (15 mL) vegetable oil
2-1/2 cups (625 mL) small mushrooms (about 8 oz/250 g)
1 onion, diced
1 tsp (5 mL) dried thyme
1/4 tsp (1 mL) each salt and pepper
1-1/2 cups (375 mL) sodium-reduced beef stock
1 tbsp (15 mL) each cornstarch and Dijon mustard
1 cup (250 mL) frozen peas
Preparation:
In large saucepan of boiling salted water, cover and cook potatoes until tender, about 12 minutes. Drain and return to pot; shaking pan, dry over low heat, about 1 minute. Mash coarsely; stir in milk and green onion.
Meanwhile, in skillet, fry beef over medium-high heat, breaking up with spoon, until no longer pink, about 5 minutes. Transfer to plate. Drain fat from skillet.
In same skillet, heat oil over medium heat; fry mushrooms, onion, thyme, salt and pepper, stirring occasionally, until mushrooms are golden, about 8 minutes.
Whisk together stock, cornstarch and mustard; stir into skillet. Add beef and peas; bring to boil. Reduce heat and simmer until thickened and heated through, about 5 minutes. Serve over potatoes.