Season chicken with kosher salt, freshly ground black pepper, and garlic powder, add to a bowl with balsamic vinegar. Allow to marinate in the fridge for about 30 minutes
Meanwhile, prepare your salad. In a large bowl add your mixed greens, season with salt to taste. Add strawberries, cucumbers, red onion, pecans, and feta cheese.
Heat up your outdoor BBQ, and grill your balsamic marinated chicken until fully cooked. Allow to rest under a tent of foil.
Meanwhile, begin on your vinaigrette dressing, by combining all ingredients and whisk vigorously until fully emulsified.