Step 1

For the potatoes, preheat oven to 500°F

Step 2

Cover the potatoes with water and bring to a boil

Step 3

Salt the water and cook until just tender, drain and cool

Step 4

Halve and lightly crush the potatoes with bottom of a glass, flesh-side up, season with a little garlic, salt and pepper and spray with oil

Step 5

Transfer to oven and brown, top with cheeses, melt and brown again, top with scallions

Step 6

Serve five halves per person, 2 ½ potatoes total

Step 7

While potatoes are boiling, prep sauce and burgers

Step 8

For the chimichurri, pulse-chop all the ingredients up to the salt and pepper in a food processor

Step 9

Combine with sour cream and ketchup to make the special sauce

Step 10

For the burgers, preheat cast-iron skillet over medium-high heat

Step 11

Listicle: Rachael Ray 12-Inch Cast Iron Frying Pan Place beef in a bowl and season with Worcestershire, salt and pepper, add chorizo and combine

Step 12

Score meat and form four patties thinner at center for even cooking

Step 13

Spray skillet and cook patties 8 minutes, turning occasionally

Step 14

Build burgers: roll bottom, pickles and chopped or sliced onion, burger, lettuce and tomato, sauce and bun top

Step 15

Pass extra sauce at table

Step 16

Serve with potatoes