These are beef sliders topped with a sharp, garlicky chimichurri made from parsley, oregano, red wine vinegar, and olive oil — finished with melted provolone on a toasted brioche bun. The honest reason to make them: the chimichurri comes together in one bowl while the patties cook, so you’re done in under an hour with almost nothing to wash up.
Before you start
Two things actually matter here. First, make the chimichurri before you touch the beef. It needs at least 15 minutes sitting at room temperature for the garlic and vinegar to mellow into the oil — rushed chimichurri tastes sharp and raw in a way that doesn’t work. Second, form your patties slightly wider than the buns. Slider patties shrink noticeably on a hot grill pan, and a patty that’s smaller than the bun makes every bite uneven. Press a small indent in the center of each one with your thumb to help them cook flat rather than doming up in the middle.
Mistakes to avoid
- Overworking the beef: Mix in the salt and pepper with just a few folds. The more you handle ground beef, the tighter the proteins bind and the denser the cooked patty gets. Stop as soon as the seasoning looks distributed.
- Skipping the thermometer: Ground beef must hit 160°F (71°C) internal temperature. The 4–5 minutes per side guideline is a starting point, not a guarantee — pan temperature, patty thickness, and starting meat temperature all vary. A cheap instant-read thermometer removes the guesswork entirely.
- Adding chimichurri too early in assembly: Spoon the chimichurri on right before serving, not during assembly if you’re making a batch. The vinegar softens the toasted bun fast, and you’ll end up with a soggy bottom within a couple of minutes.
- Using dried oregano instead of fresh: The recipe calls for fresh oregano, and it matters — dried oregano at the same volume is significantly more intense and turns the sauce dusty-tasting rather than bright. If fresh oregano isn’t available, use one teaspoon dried as a substitute, not three tablespoons.
- Pulling the cheese too early: Provolone needs direct residual heat to melt properly on a small patty. Add it in the last minute of cooking with a lid or foil tent over the pan to trap steam. Without that cover, it just sits on top and barely melts.
Leftovers and meal prep
Cooked patties keep in an airtight container in the fridge for up to 3 days. Reheat them in the same grill pan over medium heat for about 2 minutes per side — the microwave works but makes the texture rubbery. Chimichurri actually improves on day two once the flavors have had time to settle; it keeps refrigerated for up to 5 days in a sealed jar. Give it a stir and let it come to room temperature before using, since the olive oil will solidify slightly when cold. For meal prep, you can form and season the raw patties up to 24 hours ahead — stack them with parchment between each one and refrigerate uncovered for the first 30 minutes so the surface dries out slightly, which helps them sear better.
Uruguayan Beef and Chimichurri Slider
Ingredients
Sliders
- 500 grams ground beef preferably grass-fed
- 1 teaspoon kosher salt
- ½ teaspoon ground black pepper
- 4 medium slider buns soft or brioche
- 4 slices provolone cheese
Chimichurri Sauce
- 1 cup flat-leaf parsley finely chopped
- 3 tablespoons fresh oregano finely chopped
- 3 cloves garlic minced
- ¼ cup red wine vinegar
- ½ cup extra-virgin olive oil
- ½ teaspoon red chili flakes adjust to taste
- 1 pinch salt and pepper to taste
Instructions
- Prepare the Chimichurri: In a bowl, combine the chopped parsley, oregano, minced garlic, red wine vinegar, olive oil, and chili flakes. Stir well and season with salt and pepper to taste. Allow the flavors to meld while you prepare the sliders.
- Make the Beef Patties: In a large bowl, mix the ground beef with salt and black pepper. Divide into four equal parts, forming into small patties about the size of your buns.
- Cook the Patties: Heat a grill pan over medium-high heat. Place the patties on the grill and cook for 4-5 minutes on each side until they are browned and cooked to your liking (internal temperature should reach 70°C / 160°F for medium). In the last minute of cooking, place a slice of provolone cheese on each patty and allow it to melt.
- Toast the Buns: Meanwhile, halve the slider buns and lightly toast them on the grill until they are golden brown.
- Assemble the Sliders: Place a melted cheese-topped patty on each bun base. Top generously with chimichurri sauce and finish with the bun lid. Serve immediately.
Notes
Nutrition
Your questions, answered
Can I cook these on an outdoor grill instead of a grill pan?
Yes, and it works well. Use medium-high direct heat and make sure the grates are clean and oiled so the small patties don’t stick or fall apart when you flip them. Slider patties are thin, so the cook time stays roughly the same — still check for 160°F (71°C) internal temperature.
What can I use instead of provolone?
Low-moisture mozzarella is the closest swap — it melts cleanly and has a mild flavor that doesn’t compete with the chimichurri. Monterey Jack also works. Avoid anything aged and crumbly like aged cheddar; it won’t melt well on a small patty in the time available.
My chimichurri tastes too sharp and vinegary. How do I fix it?
Give it more time — 15 minutes is the minimum, but 30 minutes makes a real difference as the acid mellows. If it still tastes too sharp after resting, add another tablespoon of olive oil and a small pinch of salt, which rounds out the acidity without dulling the herb flavor.
Can I make the patties ahead and freeze them?
Yes. Form and season the raw patties, place them on a parchment-lined tray, and freeze until solid — about 2 hours — then transfer to a zip-lock bag. They keep for up to 2 months. Cook from frozen on a covered grill pan over medium heat, adding 3–4 extra minutes per side, and verify 160°F (71°C) with a thermometer before serving.
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