Baja Salad

1 (12 ounce) package romaine lettuce leaves

1 large tomato

diced

1 avocado

diced

1 pickling cucumber

diced

¾ cup crumbled feta cheese

¼ cup diced red onion

¼ cup white corn kernels

¼ cup cooked black beans

¼ cup crushed tortilla chips

or to taste

2 tablespoons olive oil

2 tablespoons lemon juice

¼ teaspoon ground cumin

1 pinch salt and ground black pepper to taste