Prepare the Vegetables: In a large mixing bowl, add halved cherry tomatoes, chopped carrots, yellow pepper, broccoli florets, asparagus pieces, diced red onion, chopped red cabbage, cauliflower florets, and cubed pepper jack cheese.
Make the Dressing: In a small bowl, combine olive oil, apple cider vinegar, dijon mustard, lemon juice, ranch seasoning, salt, and black pepper. Whisk or shake vigorously until everything is well combined into a smooth dressing.
Combine Dressing and Vegetables: Pour the prepared dressing over the vegetable mixture in the large bowl. Toss everything together until all vegetables are evenly coated in the dressing.
Marinate the Salad: Cover the bowl with plastic wrap or a lid and place it in the refrigerator to marinate for at least two hours or overnight if possible.
Serve Your Salad: After marinating, give the salad one more stir before serving it chilled as a refreshing side dish or a hearty lunch option.