Step 1

In a large skillet, brown the beef until no longer pink. Drain off excess grease. Add onion, garlic, and zucchini and saute for 3-5 minutes.

Step 2

Add carrots and peas and stir together.

Step 3

Add Worcestershire sauce and tomato paste. Season with thyme and cook for about 1 minute.

Step 4

Add broth and simmer until 10-15 minutes or until sauce has thickened. Taste and adjust seasoning.

Step 5

Transfer beef mixture to a deep casserole dish. You can use an 8×8 square pan, a casserole or you can make individual servings.

Step 6

Spoon mashed potato on top of beef. Sprinkle with grated Parmesan cheese and cheddar cheese. Place the dish on a cookie sheet in case it bubbles over while baking.

Step 7

Bake in a 375° F oven for 20 minutes or until top is brown and heated through. The sides may be bubbly. Garnish with chopped scallions.