Preheat the oven to 425 degrees then line a baking sheet with parchment paper or nonstick-sprayed foil. Place the asparagus on top then drizzle with extra virgin olive oil and season with garlic salt and pepper. Toss with your hands to coat then spread out into an even layer and roast until crisp-tender, 7-9 minutes, depending on the thickness of the asparagus spears.
Meanwhile heat a large skillet over medium-high heat then spray with nonstick spray. Season both sides of the chicken breasts with lemon pepper seasoning then saute for 3-4 minutes per side or until cooked through. Remove to a plate then loosely tent with foil and set aside to rest for 5 minutes.
For the Artichoke Salsa: add the ingredients into a small mixing bowl then stir to combine. Can be made up to 24 hours ahead of time.
Divide the roasted asparagus between 4 plates then top each portion with a sauteed chicken breast and scoop of Artichoke Salsa. Add 1 Tablespoon feta cheese and a quarter of the chopped tomatoes to each plate then serve.