Step 1

Bring a large pot of water to a boil. Add the potatoes and cook until fork tender, 20 to 25 minutes.

Step 2

Drain the potatoes and transfer them to a large bowl. Place the pot used for cooking the potatoes over medium-high heat and warm 2 tablespoons butter until melted. Add the garlic and cook until fragrant, 30 to 45 seconds. Remove from the heat.

Step 3

Add the potatoes, 1 tablespoon butter, sour cream or milk, cumin, chili powder, and salt and mash until the potatoes are creamy and smooth. Taste and, if desired, add more butter, sour cream or milk, and/or spices and salt.

Step 4

While the potatoes are cooking, make the pico de gallo. In a medium bowl, combine the tomatoes, red onion, lime juice, and cilantro and stir to combine. Season with salt to taste.

Step 5

In a large nonstick skillet over medium-high heat, warm the oil. Spread about 1/4 cup of the mashed potatoes on one side of each tortilla and fold in half to create tacos.

Step 6

Working in batches, add a few tacos to the skillet, pressing down on the top of each for about 10 seconds to set its shape. Continue to cook until the underside is golden and crisp, 2 to 3 minutes. Carefully flip with a small spatula and repeat on the other side.

Step 7

Carefully tuck some pico de gallo, cabbage, cotija, and cilantro in each taco. Serve immediately with the lime wedges on the side.