In a small saucepan, add the potatoes and enough water to cover them completely. Bring to a boil over high heat, reduce heat to low, cover, and simmer for 8 minutes or until the potatoes are cooked through. Carefully drain the water and set aside.
Add the frozen mixed vegetables to a medium microwave-safe bowl and heat them in the microwave on high for 4-6 minutes, stirring halfway through, until fully thawed. Set aside.
Whisk together the mayonnaise, sour cream, Mexican crema, lime juice, pickled jalapeño brine, and salt in a small bowl.
Add the cooked potatoes, thawed mixed vegetables, shredded chicken, and mayonnaise mixture in a large bowl. Toss them together to combine.
Taste and season the ensalada with more salt or pickled jalapeño brine if desired. Refrigerate for 1-2 hours or until chilled.
Serve with saltine crackers, on tostada shells, with tortilla chips, or in a sandwich.
Notes
Veggies: A bag of frozen mixed vegetables usually includes a mix of green beans, carrots, corn, and peas.
Chicken: You can use any leftover shredded chicken you have in the fridge. If you don’t have any, here’s an easy recipe for shredded chicken that you can make right at home. If you don’t have time to make your own, I recommend buying a cooked rotisserie chicken from the grocery store and shredding it at home.
Mexican crema: Adding a bit of crema Mexicana gives the ensalada a thicker, richer, and creamier flavor than only using sour cream. However, you can use more sour cream if you can't find any near you.
Pickled jalapeño: The pickled jalapeño brine adds a nice tangy and vinegary flavor that compliments the mayonnaise and sour cream. You can use mild or hot pickled jalapeño brine, depending on whether you like spicy food or not.
To make it extra creamy, mix in more mayonnaise to your liking.
To make it spicy, serve the salad with pickled jalapeño slices to add heat to each bite.