Wash your lettuce and chop lettuce into bite-sized pieces. Dice your tomato. Slice your cucumber length-wise into quarters and then slice the other way into ⅛ inch slices.
Add vegetables to a large salad bowl. Top with meat-bean mixture. Add ranch, salsa, and crushed Doritos®. Toss to combine and serve immediately. Top with sour cream if desired.
I normally make this salad ⅓ at a time and put the remaining meat-bean mixture in the fridge for later. ⅓ of this salad will make a filling meal for 2 hungry adults.