Combine cumin, paprika, chili powder, onion powder, garlic powder, and chicken bouillon powder in a small bowl. Add salt and pepper to taste (I start with 1/2 teaspoon of each). Set aside.
Heat olive oil in a large nonstick pan over medium-high heat. Add garlic and cook until fragrant, about 30 seconds. Stir in the spices and cook for 1 minute. Add tomato paste and hot water, stirring until smooth. Simmer over medium heat for 2–4 minutes until slightly thickened.
Add the shredded chicken to the sauce and toss until evenly coated. Adjust seasoning to taste with more salt, pepper, or a pinch of sugar if needed. Squeeze in fresh lime juice (I add 1-2 tablespoons). Remove from heat.
If desired, divide 1 cup of cheese among the bottoms of the taco shells and broil for 1–2 minutes until melted (watch closely to avoid burning!). Fill the shells with chicken and sprinkle the remaining 1 cup of cheese on top—it will melt from the warm chicken. Add your favorite toppings like lettuce, tomatoes, avocado, and sour cream. Serve immediately!
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Notes
Note 1: I use Knorr® Seasoning Granulated Chicken Bouillon. You can use chicken broth in place of the water and bouillon.Note 2: Toppings: shredded lettuce (iceberg or romaine), pico de gallo or chopped cherry tomatoes, cilantro, fresh lime, avocado, sour cream, etc. (whatever you love on your chicken tacos!)Storage: Store leftover Rotisserie Chicken Tacos by keeping each part separate. Refrigerate chicken in an airtight container for 3-4 days!