Oven-Roasted Beef with Horseradish Cream and Root Vegetables
A hearty British-inspired roast beef dish featuring tender beef, roasted root vegetables, and a tangy horseradish cream sauce. This british-inspired beef ready in about 75 minutes pairs pounds beef sirloin roast, medium, peeled and quartered potatoes, tablespoons olive oil for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 480 calories and feeds 4, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart.
Ingredients
- 2 pounds beef sirloin roast
- 3 medium, peeled and cut into 1-inch chunks carrots
- 2 medium, peeled and cut into 1-inch chunks parsnips
- 4 medium, peeled and quartered potatoes
- 3 tablespoons olive oil
- 1 teaspoon salt
- 1/2 teaspoon black pepper
- 2 sprigs fresh rosemary
- 4 whole, peeled garlic cloves
- 1/2 cup sour cream
- 2 tablespoons prepared horseradish
- 1 teaspoon lemon juice
Instructions
- Step 1: Preheat your oven to 400°F. Toss 3 medium carrots, 2 medium parsnips, and 4 medium potatoes, all peeled and cut into 1-inch chunks, with 2 tablespoons olive oil, 1/2 teaspoon salt, and 1/4 teaspoon black pepper. Spread on a roasting pan.
- Step 2: Rub 2 pounds beef sirloin roast with 1 tablespoon olive oil, 1/2 teaspoon salt, 1/4 teaspoon black pepper, and tuck 2 sprigs fresh rosemary and 4 whole peeled garlic cloves around the beef on the pan. Roast in the oven for 25 minutes.
- Step 3: Reduce oven temperature to 350°F and continue roasting for another 20 minutes for medium-rare, or until a meat thermometer reads 135°F. Remove beef and vegetables from oven and tent with foil to rest for 15 minutes.
- Step 4: Meanwhile, mix 1/2 cup sour cream, 2 tablespoons prepared horseradish, and 1 teaspoon lemon juice in a small bowl until smooth. Adjust seasoning with salt to taste.
- Step 5: Slice the rested beef thinly against the grain and serve alongside the roasted root vegetables with a dollop of horseradish cream sauce on top.
Frequently asked questions
How long does Oven-Roasted Beef with Horseradish Cream and Root Vegetables take to make?
Total time is about 75 minutes (20 min prep + 55 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.
How do I store leftover Oven-Roasted Beef with Horseradish Cream and Root Vegetables?
Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep pounds beef sirloin roast from drying out.
Can I substitute ingredients in Oven-Roasted Beef with Horseradish Cream and Root Vegetables?
Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.
How do I scale Oven-Roasted Beef with Horseradish Cream and Root Vegetables for a different number of people?
The recipe is written for 4 servings. Multiply each ingredient by (your serving target / 4). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.
What goes well with Oven-Roasted Beef with Horseradish Cream and Root Vegetables?
British beef like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.
