Preheat the oven to 400 degrees.
Drain the can of garbanzo beans into a colander. Rinse the beans in the colander, then transfer them to a clean towel.
Pat dry the chickpeas. Some skins may fall off, that's okay! Peel those away, but don't peel all of the beans.
Transfer the beans to a sheet pan. Drizzle with olive oil and season with salt and pepper. Toss to coat.
Roast in the oven for 25 minutes.
While the chickpeas are roasting, prepare the Greek vinaigrette. Place the olive oil, red wine vinegar, dried oregano, and garlic salt into a mason jar or reusable dressing bottle. Shake to combine.
Add the romaine lettuce, cherry tomatoes, cucumber, red onion, and feta to a large salad bowl.
Toss on 1/2 cup of the roasted chickpeas (usually about 1/2 of the chickpeas you roasted) and toss with a 1 to 2 teaspoons of the Greek vinaigrette.