Start by prepping your sweet potatoes, because they are the longest-lead item in this recipe and everything else revolves around their timing. Scrub 4 medium sweet potatoes (10–12 oz each) under cool running water with a vegetable brush to remove every trace of grit, then dry them thoroughly with a clean kitchen towel — dry skin is what lets the olive oil cling and the skin crisp instead of steam. Prick each potato 6–8 times all over with the tines of a fork, spacing the holes evenly. This is not optional busywork: those tiny vents let steam escape so the potatoes bake fluffy instead of turning dense and waterlogged, and they prevent the potatoes from bursting in the microwave. Rub each one with a thin film of olive oil and season the outsides lightly with kosher salt. If you are using the oven method, preheat to 425°F (220°C) and line a sheet pan with parchment or foil. If you are in a hurry, this is also the moment to gather every remaining ingredient — the ground beef, onion, garlic, tomato paste, spices, broth, Worcestershire, mozzarella, and garnishes — so that once the beef hits the pan you never have to stop and hunt for anything.

Cook the sweet potatoes using whichever method fits your night, and pay attention to the sensory cues rather than the clock alone. Fast method: microwave the potatoes on a microwave-safe plate for 5 minutes on high, flip them, then microwave in 3-minute bursts until a paring knife slides in with zero resistance and the potatoes feel soft when squeezed with a toweled hand — usually 8–12 minutes total depending on size and microwave wattage. For the crispiest skin, transfer those microwaved potatoes to a 425°F (220°C) oven for 10 minutes to firm up and caramelize the exterior. Classic oven method: bake directly on the rack or on a sheet pan at 425°F (220°C) for 40–55 minutes, until the skin is wrinkled, glossy, and slightly blistered and a knife glides through the center like warm butter. You will know they are done when they smell sweet and toasty and give under gentle pressure. Set them aside on a cutting board to rest for at least 5 minutes — resting lets the interior starch settle so the flesh stays fluffy when you split it instead of collapsing into mush.

While the potatoes cook, heat 1 tablespoon of olive oil in a large skillet over medium-high heat until it shimmers and moves like water across the pan, which signals it is hot enough to sear rather than steam. Add 1 cup of finely diced yellow onion and cook for 3–4 minutes, stirring occasionally, until the pieces turn translucent and just begin to pick up golden edges. Add 3 cloves of minced garlic and 1 tablespoon of tomato paste and cook for 60 seconds, mashing the paste into the onions with the back of your spoon. That minute of cooking is what transforms raw, tinny tomato paste into a sweet, concentrated flavor base — skip it and the filling tastes flat. The kitchen should smell sweet, savory, and deeply aromatic at this point, which is your cue that the aromatics are ready for the beef.

Add 1 lb of lean ground beef to the skillet and break it into small, even crumbles with a wooden spoon or spatula. Resist the urge to stir constantly: let the beef sit undisturbed for 2–3 minutes so it develops a deep brown crust (the Maillard reaction), then break it up and continue cooking for another 4–5 minutes until no pink remains and the crumbles are juicy but no longer releasing puddles of liquid. If your beef was 85/15 or fattier, tilt the pan and spoon off excess fat now so the finished filling is rich, not greasy. Season as you go, not just at the end — layering salt into the meat at this stage seasons it from the inside out.

Sprinkle the dry seasoning blend evenly over the browned beef: 1 teaspoon garlic powder, 1 teaspoon onion powder, 1 teaspoon smoked paprika, 1/2 teaspoon ground cumin, 1/2 teaspoon dried oregano, 1/2 teaspoon kosher salt, and 1/2 teaspoon freshly cracked black pepper. Stir for 30 seconds until every crumble is coated and the spices smell toasted and fragrant — smoked paprika and cumin bloom instantly in the hot fat, and that short toast is worth a surprising amount of flavor. Pour in 1 tablespoon Worcestershire sauce and 1/4 cup low-sodium beef broth, scraping up the browned bits stuck to the bottom of the pan. Those stuck-on bits are pure concentrated flavor, and the liquid turns them into a glossy pan sauce. Simmer for 2–3 minutes until the mixture is saucy but not soupy — it should hold together on a spoon without running off.

Taste the filling and adjust: it should be savory, slightly smoky, and well seasoned but not salty, because the mozzarella will add its own salinity. If it tastes flat, a pinch more salt or a few drops of Worcestershire will wake it up; if it tastes sharp, a tiny pinch of sugar balances the tomato paste. Turn off the heat and stir in 1/2 cup of the shredded mozzarella so it melts into the beef and acts as a binder, making the filling scoopable and extra rich. Let the filling rest in the pan while you finish the potatoes — this brief rest lets the cheese fully melt and the sauce thicken to the perfect stuffing consistency.

Split each rested sweet potato lengthwise down the middle with a small knife, cutting about three-quarters of the way through but leaving the bottom intact so it forms a sturdy ‘boat.’ Using a fork, gently fluff the bright orange flesh inside each potato, pulling it slightly away from the skin and creating a little well. This fluffing step is the difference between a dense, gummy potato and one that tastes like a cloud of buttery sweetness. Season the insides lightly with a pinch of salt, and if you like, a small smear of butter or a spoonful of sour cream. Nestle the potatoes into a baking dish or onto a sheet pan so they stand upright and stay stable while you load them.

Spoon the seasoned beef filling generously into each potato, mounding it high and pressing it gently into the fluffed flesh so the filling and potato become one cohesive bite rather than two separate layers. Divide the filling evenly — each potato should hold roughly a heaping half-cup. Top each one with the remaining 1 cup of shredded mozzarella, spreading it to the edges so it drapes over the filling and creates those irresistible crispy cheese edges where it meets the hot skillet or pan. Do not skimp on the cheese here; it is the textural crown of the whole dish and the reason this recipe feels indulgent while still being packed with protein.

Finish the stuffed potatoes under the broiler. Set your oven rack about 6 inches from the heating element and broil on high for 3–5 minutes, watching them the entire time — broilers go from golden to burnt in seconds, and ovens vary wildly in intensity. You are looking for mozzarella that is fully melted, glossy, and bubbling, with a few bronzed spots across the surface. The moment you smell toasted cheese and see bubbles popping, pull them out. If you prefer not to use the broiler, return the stuffed potatoes to a 400°F (200°C) oven for 8–10 minutes, or simply cover the pan for 2 minutes so the residual heat melts the cheese.

Serve immediately while the cheese is still stretchy and molten. Plate each potato and top with a dollop of sour cream or plain Greek yogurt, a shower of chopped fresh parsley or cilantro, and a pinch of flaky sea salt. If you like heat, sliced pickled jalapeños, a drizzle of hot sauce, or a few dashes of chili crisp are fantastic. These are a complete meal on their own, but they also love a simple side of steamed broccoli, a crisp green salad with lemon vinaigrette, or a scoop of charred corn. Any leftovers should be cooled within 2 hours, stored in an airtight container in the refrigerator for up to 4 days, and reheated in a 350°F (175°C) oven, covered, for 12–15 minutes so the potato reheats gently without drying out — the microwave works in a pinch but softens the skin.