Grilled Chicken Nachos with Lime Crema
1 (8 ounce) package shredded Mexican cheese b… 1 (8 ounce) package shredded pepper Jack chee… 1 cup sour cream 1 lime, juiced 1 pinch cayenne pepper, or to taste 1 splash heavy cream, or as needed 1 tablespoon chopped fresh cilantro, or to ta… 1 teaspoon chopped fresh cilantro 2 (13 ounce) packages restaurant-style tortil… 2 each limes, zested 2 large skinless, boneless chicken breasts, t… 4 tablespoons olive oil 4 tablespoons tequila ¼ teaspoon garlic powder, or more to taste ¼ teaspoon ground cumin, or more to taste ¼ teaspoon salt, or to taste ½ cup mayonnaise