Whisk together oil, lemon juice, lemon zest, honey and garlic.
Place steak and 2 Tbsp of marinade in the large ziplock bag and massage to coat steak with marinade. Let stand at room temperature for 40 minutes.
Add cucumber, snap peas, and squash to remaining marinade and toss to coat.
Heat cast iron skillet over medium-high heat for 3 minutes. Take steak out of marinade, sprinkle with ¾ tsp salt. Cook steak until desired doneness.
Transfer to a cutting board and let sit for 5 minutes.
In the meantime, add greens, pita chips, and ¼ tsp salt to the cucumber mixture in a bowl.
Slice steak against grain. Divide salad evenly among 4 plates, and arrange sliced steak alongside salad.