Mince garlic and chop cilantro leaves. Then add garlic, cilantro, and olive oil to a small bowl. Squeeze lime juice into the bowl, then add salt and pepper. Stir. Set aside.
Dice tomato and set aside.
Slice bell peppers and onions into strips, then saute in a 12 inch skillet with about 1 tablespoon of oil for about 5 minutes over medium heat, stirring occasionally. Then, place in a small bowl off to the side.
In the same pan, place ground beef (or chicken) and cook over medium heat for 5-7 minutes, or until you can no longer see any pink and it is cooked thoroughly. Drain meat, then add taco seasoning and water per directions on the packet.
Get 4 bowls or plates for salad and place 1.5 cups of lettuce in each one. Then, divide up and add tomato, ground beef, peppers, onions, and cheese to each one. Top with crushed tortilla chips and the cilantro lime dressing.
OPTIONAL: Can add avocado or salsa for more flavor. Salsa could also replace the cilantro lime dressing.