Let's get started on this scrumptious dish by first preparing the quinoa. Give it a good rinse and place it in a saucepan with 2 cups of water. Cook over low heat for about 10 minutes until the water is fully absorbed. Add salt to taste and set it aside.

While the quinoa is cooking, chop up the tomato and slice the avocado. Cut the carrot into thin slices or dice as desired.

Now, let's make the dressing. Grab a small bowl and whisk together the olive oil, Dijon mustard, and vinegar. Give it a taste and season it further if needed.

To serve, grab a large bowl and layer it with the lettuce, quinoa, tomatoes, carrots, and avocado. Drizzle the dressing on top and give it a good toss to combine all the ingredients.