First, we have to marinade the chicken in the buttermilk mixture. Add chicken tenders and marinade ingredients together in a large ziplock bag. Close bag and shake together to combine ingredients. Place in refrigerator to marinate for at least 1 hour and up to 8 hours.
Prepare mayo spread by mixing mayo, lemon juice, 1/2 teaspoon garlic powder, and 1/8 teaspoon paprika together in a medium bowl. Set aside until we assemble the tacos.
Prepare the chicken breading by stirring all ingredients together in a shallow bowl. Remove chicken from refrigerator. Remove one tender from the bag and shake off excess marinade and place in flour mixture. Coat completely in flour and shake off excess. Place on clean plate and repeat with rest of the tenders.
Heat 2-3 cups of oil in a large skillet on medium heat. I used my cast iron one. Once it gets hot, add chicken tenders one at a time, cooking a maximum of 4 tenders at a time. You don't want to crowd the pan or else the oil will cool down too much. Cook for 3 minutes on one side, flip and then cook for another 1 1/2 minutes or until deep golden brown. Drain on paper towels. Repeat with rest of chicken tenders until complete.
To assemble the tacos, spread a little mayo on the flour tortilla. Place one leaf of lettuce on top of mayo, then add 1 or 2 chicken tenders, depending on the size of the tenders. Top with more mayo and diced tomatoes. Repeat with remaining tortillas. Serve immediately.