Lean Beef Cottage Pie Casserole Fall Comfort Food — 34g Protein

This lean beef cottage pie casserole fall comfort food is the lighter cousin of the classic — lean ground beef simmered with carrots, peas and onion in a savoury gravy, topped with fluffy mashed potatoes whipped with Greek yogurt instead of piles of butter. It bakes up golden and bubbling, with 34g of protein per serving, in 60 minutes.

The trick is the topping. Boil the potatoes until they are properly soft, then mash them with warm milk and Greek yogurt — the yogurt adds tang and protein and keeps the mash light, so it spreads easily and browns beautifully in the oven.

Why you’ll love it

• 34g protein per serving, about 430 calories
• Proper fall comfort food, lightened with lean beef and Greek yogurt mash
• One baking dish, 60 minutes — easy enough for a weeknight, good enough for Thanksgiving week
• Freezes brilliantly, so make two and save one

Ingredients

• 600g lean ground beef (5% fat)
• 600g potatoes, peeled and cut into chunks
• 150g Greek yogurt, plain
• 2 medium carrots, diced
• 150g frozen peas
• 1 large onion, diced
• 2 garlic cloves, minced
• 2 tbsp tomato paste
• 250 ml beef broth, low sodium
• 1 tbsp Worcestershire sauce
• 1 tbsp olive oil
• 1 tsp fresh thyme leaves
• 60 ml warm milk
• 1 tsp coarse sea salt
• 1 tsp black pepper, freshly ground
• Fresh parsley, to serve

Equipment used

• A large skillet, for browning the beef and cooking the filling
• A large saucepan, for boiling the potatoes for the topping
• A potato masher, for a fluffy mashed potato topping
• A 2-litre baking dish, for assembling and baking the cottage pie

Instructions

1. Heat the oven to 200°C (400°F). Boil the potatoes in salted water for 15–18 minutes, until very tender, then drain.
2. Mash the potatoes with the warm milk and Greek yogurt until fluffy. Season with salt and pepper and set aside.
3. Heat the olive oil in a large skillet over medium-high heat. Brown the ground beef for 6–8 minutes, breaking it up, then drain off any fat.
4. Add the onion and carrots and cook for 5 minutes until soft, then add the garlic and tomato paste and cook for 1 minute more.
5. Pour in the beef broth and Worcestershire sauce, add the thyme, and simmer for 10 minutes until the filling thickens. Stir in the peas.
6. Spoon the filling into the baking dish and spread the mashed potatoes over the top, roughing up the surface with a fork.
7. Bake for 20–25 minutes, until the topping is golden and the filling is bubbling at the edges. Rest 5 minutes, scatter over parsley, and serve.

Tips

• Use properly lean beef so the filling isn’t greasy — 5% fat works best here.
• Mash the potatoes while they are hot so the yogurt melts in smoothly.
• Rough up the topping with a fork before baking — the ridges catch the heat and turn golden and crisp.
• It keeps 3 days in the fridge and freezes for up to 3 months; reheat covered in a moderate oven.

Estimated nutrition per serving

These are estimated macros based on standard ingredient values, not lab-measured results.

More high-protein recipes to try

• Healthy Ground Beef Shepherd’s Pie with Mashed Cauliflower
• Lamb Shepherd’s Pie with Greek Yogurt Mashed Potatoes
• Cheesy Beef and Cauliflower Mash Thanksgiving Casserole — 30g Protein

FAQ

What is the difference between cottage pie and shepherd’s pie? Cottage pie is made with beef and shepherd’s pie with lamb — this lean beef cottage pie casserole fall comfort food is a cottage pie, a beef filling under a mashed potato topping.

Is this lean beef cottage pie casserole fall comfort food good for meal prep? Yes. Assemble it the day before and refrigerate, then bake for 25–30 minutes until hot through. It also freezes well in portions for up to 3 months.

Can I use sweet potatoes for the topping? Yes — swap half the potatoes for sweet potatoes for a sweeter, more autumnal topping. The mash will be softer, so spread it gently.

Can I make it without peas? Yes. Swap in sweetcorn or green beans, or leave them out — the filling is flavourful enough on its own.

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