Papas en Chile Rojo Potatoes in Red Salsa

Name: Papas en Chile Rojo (Potatoes in Red Salsa)
Ingredients: 1⁄4 cup roughly chopped cilantro; 4 plum tomatoes, cored; 2 red jalapeños, stemmed; 1 clove garlic, smashed; Kosher salt and freshly ground black pepper, to taste; 1⁄2 cup canola oil; 2 lb. Yukon Gold or red potatoes, peeled, quartered lengthwise, then cut into 1/2″-thick slices