Zest 1 lime to yield about 1/4 teaspoon zest and juice the lime to get about 2 tablespoons juice; set aside.
Preheat the oven to 400°F (200°C) and arrange a very large sheet pan or two smaller pans.
Make the cilantro-lime sauce: combine 1/2 cup loosely packed cilantro, 1/2 teaspoon minced garlic, 1/2 tablespoon minced jalapeño, 1/4 cup mayonnaise, 1/4 cup sour cream, 1/4 teaspoon salt, 1/8 teaspoon pepper, the lime zest, and 2 tablespoons lime juice in a food processor or blender; blend until smooth, then transfer to a jar and refrigerate.
Heat 1 tablespoon olive oil in a large cast-iron skillet over medium-high heat. Add the finely diced 1/2 cup yellow onion and cook 3–5 minutes until soft and translucent.
Add 2 teaspoons minced garlic and cook 20–30 seconds, then stir in the spices: 1 tablespoon chili powder, 1 teaspoon cumin, 1 teaspoon paprika, 1/2 teaspoon onion powder, 1/2 teaspoon garlic powder, 1/2 teaspoon dried oregano, 1/2 teaspoon salt, 1/2 teaspoon pepper, and 1/2 tablespoon chicken bouillon powder; cook and stir about 30 seconds until fragrant.
Push the aromatics to the side of the pan and add 1 pound ground chicken to the center. Crumble and cook about 4–5 minutes until no longer pink (drain excess liquid if needed).
Stir in 1/2 cup tomato sauce and scrape the pan to release browned bits; simmer 3–5 minutes until the chicken is cooked through. Remove from heat.
Arrange the 12 stand-up crispy corn tortillas on the prepared sheet pan(s) and bake for 5 minutes to prevent sogginess.
Fill each pre-baked shell with a heaping 1/4 cup of the chicken filling and top with 2 tablespoons shredded cheese; repeat until all shells are filled.
Bake filled tacos for 8–15 minutes, until shells are crispy and cheese is melted and bubbly.
Top tacos with desired toppings and cilantro-lime sauce, then serve immediately.