In a medium bowl, add lemon juice and zest, cumin, 1 tablespoon olive oil, chicken and sea salt and freshly ground pepper to taste.
Marinate in the refrigerator for 30 minutes.
On the best flat top grill you can find, grill chicken over medium high heat for 5 to 6 minutes per side until the chicken is cooked through.
In a medium bowl, add tomatoes, avocados, onion, chile, lime juice, remaining olive oil and sea salt and freshly ground pepper to taste. Stir to combine.
Serve chicken with salsa.
Recipe by simple+well at https://www.simpleandwell.net/recipes/grilled-chicken-with-avocado-salsa/