In a small jar, whisk the lime juice, garlic, cilantro, salt, chili flakes (or pepper), and olive oil until well combined. Set aside.
Chop all your veggies, removing any seeds/skin/stems needed.
In a large mixing bowl, add boiled sweet corn, avocado (diced), grape tomatoes (halved), and onion (thinly sliced). Pour the dressing over the salad and toss to coat. That's it! Serve it right away.
Notes
You can add additional vegetables of your choice like edamame, bell pepper, lettuce.
Add ½ cup of cooked or canned black beans for extra protein.
Note: Nutrition values are my best estimates. If you rely on them for your diet, use your preferred nutrition calculator.