Brown chicken in a little olive oil over medium heat. When no longer pink, add taco seasoning packet and water. Bring to a boil then simmer on low for 10 minutes.
Lay tortillas on sheet pan and spray with cooking spray. Bake in the oven at 400 degrees for 7-9 minutes.
Once crispy, divide the seasoned meat between the flour tortillas and top each with 2 tbsp. shredded cheese. Bake for another 2-3 minutes or until cheese has melted.
In a bowl, combine sliced cherry tomatoes and red onions with kosher salt and some lime juice. Slice jalapeño and chop the cilantro.