Select a method to cook your chicken breast. (I use my Pampered Chef Deep Covered Baker and microwave chicken in enchilada sauce for 14 minutes). Other options - heat enchilada sauce in a large skillet and add chicken. Cook on each side 5 minutes or until cooked through (internal temp of 165). Can also bake chicken at 350 in baking dish with enchilada sauce poured over top.
Once chicken is cooked, shred or cut using kitchen shears. (If shredded, leave time to let chicken cool before handling). Add 1/4 tsp each cumin, salt and pepper to the chicken.
Place zucchini boats in a baking pan or baking stone. Scoop chicken mixture into each zucchini. Top with cheese. Add to heated oven and bake 10-15 minutes. (For a softer textured zucchini bake closer to 20 minutes).
Remove from oven and sprinkle cilantro and tomato and serve.