Preheat the oven to 450°F. Line a sheet pan with foil. Fill a medium pot 3/4 of the way up with salted water; cover and heat to boiling on high. Wash and dry the fresh produce. Medium dice the potatoes. Peel the carrots; halve crosswise, then quarter lengthwise. In a bowl, combine the mustard, blueberry spread, worcestershire sauce, and 1 tablespoon of water (or 2 tablespoons for 4 servings).

Add the diced potatoes to the pot of boiling water. Cook 16 to 20 minutes, or until tender when pierced with a fork. Turn off the heat. Drain thoroughly and return to the pot. Add half the parmesan and a drizzle of olive oil. Using a fork or potato masher, mash to your desired consistency. Taste, then season with salt and pepper if desired. Cover to keep warm.

Meanwhile, pat the steaks dry with paper towels; season with salt and pepper on both sides. In a medium nonstick pan (or large for 4 servings), heat a drizzle of olive oil on medium-high until hot. Add the seasoned steaks. Cook 4 to 6 minutes per side for medium-rare (125°F), or until browned and cooked to your desired degree of doneness.* Leaving any browned bits (or fond) in the pan, transfer to a cutting board; let rest at least 5 minutes.

*The USDA recommends a minimum safe cooking temperature of 145°F for steak. Cook the steaks an additional 2 to 3 minutes to achieve this.
Consuming raw or undercooked meat, poultry, fish, seafood or eggs may increase your risk of foodborne illness.

While the steaks rest, to the pan of reserved fond, add the sauce (carefully, as the liquid may splatter). Cook on medium-high, stirring constantly and scraping up any fond, 30 seconds to 1 minute, or until slightly thickened. (For a thicker consistency, continue cooking the sauce. For a thinner consistency, add 1 tablespoon of water at a time to loosen.) Turn off the heat. Stir in the butter until melted and combined. Taste, then season with salt and pepper if desired. Find the lines of muscle (or grain) on the rested steaks; slice crosswise against the grain. Serve the sliced steaks with the mashed potatoes and roasted carrots. Top the steaks with the finished sauce. Garnish the carrots and potatoes with the remaining parmesan. Enjoy!